\(\frac{4}{7} + \frac{1}{{20}} = \)...

\(\begin{array}{l}\frac{4}{7} + \frac{1}{{20}} = \frac{{80}}{{140}} + \frac{7}{{140}}\\ = \frac{{87}}{{140}}\end{array}\)

\(\begin{array}{l}\frac{2}{{11}} + \frac{5}{{18}} = \frac{{36}}{{198}} + \frac{{55}}{{198}}\\ = \frac{{91}}{{198}}\end{array}\)

\(\begin{array}{l}\frac{5}{{13}} + \frac{3}{8} = \frac{{40}}{{104}} + \frac{{39}}{{104}}\\ = \frac{{79}}{{104}}\end{array}\)

\[\begin{array}{l}\frac{1}{6} + \frac{4}{{19}} = \frac{{19}}{{114}} + \frac{{24}}{{114}}\\ = \frac{{43}}{{114}}\end{array}\]

\(\begin{array}{l}\frac{3}{{17}} + \frac{2}{5} = \frac{{15}}{{85}} + \frac{{34}}{{85}}\\ = \frac{{49}}{{85}}\end{array}\)

\(\begin{array}{l}\frac{3}{5} + \frac{2}{{33}} = \frac{{69}}{{115}} + \frac{{10}}{{115}}\\ = \frac{{79}}{{115}}\end{array}\)

\(\begin{array}{l}\frac{1}{9} + \frac{5}{{14}} = \frac{{14}}{{126}} + \frac{{45}}{{126}}\\ = \frac{{59}}{{126}}\end{array}\)

\(\begin{array}{l}\frac{4}{{15}} + \frac{3}{{11}} = \frac{{44}}{{165}} + \frac{{45}}{{165}}\\ = \frac{{89}}{{165}}\end{array}\)

\(\begin{array}{l}\frac{2}{3} + \frac{4}{{17}} = \frac{{34}}{{51}} + \frac{{12}}{{51}}\\ = \frac{{46}}{{51}}\end{array}\)

\(\begin{array}{l}\frac{5}{8} + \frac{1}{7} = \frac{{35}}{{56}} + \frac{8}{{56}}\\ = \frac{{43}}{{56}}\end{array}\)

\(\begin{array}{l}\frac{3}{{10}} + \frac{2}{{19}} = \frac{{57}}{{190}} + \frac{{20}}{{190}}\\ = \frac{{77}}{{190}}\end{array}\)

\(\begin{array}{l}\frac{1}{5} + \frac{6}{{13}} = \frac{{13}}{{65}} + \frac{{30}}{{65}}\\ = \frac{{43}}{{65}}\end{array}\)

\(\begin{array}{l}\frac{4}{9} + \frac{3}{{20}} = \frac{{80}}{{180}} + \frac{{27}}{{180}}\\ = \frac{{107}}{{180}}\end{array}\)

\(\begin{array}{l}\frac{2}{7} + \frac{5}{{12}} = \frac{{24}}{{84}} + \frac{{35}}{{84}}\\ = \frac{{59}}{{84}}\end{array}\)

\[\begin{array}{l}\frac{1}{4} + \frac{6}{{11}} = \frac{{11}}{{44}} + \frac{{24}}{{44}}\\ = \frac{{35}}{{44}}\end{array}\]

\(\begin{array}{l}\frac{3}{{13}} + \frac{4}{5} = \frac{{15}}{{65}} + \frac{{52}}{{65}}\\ = \frac{{67}}{{65}}\end{array}\)

\(\begin{array}{l}\frac{2}{{17}} + \frac{5}{9} = \frac{{18}}{{153}} + \frac{{85}}{{153}}\\ = \frac{{103}}{{153}}\end{array}\)

\[\begin{array}{l}\frac{1}{3} + \frac{5}{{16}} = \frac{{16}}{{48}} + \frac{{15}}{{48}}\\ = \frac{{31}}{{48}}\end{array}\]

\(\begin{array}{l}\frac{4}{{11}} + \frac{3}{7} = \frac{{28}}{{77}} + \frac{{33}}{{77}}\\ = \frac{{61}}{{77}}\end{array}\)

\(\begin{array}{l}\frac{2}{5} + \frac{4}{{21}} = \frac{{42}}{{105}} + \frac{{20}}{{105}}\\ = \frac{{62}}{{105}}\end{array}\)

\(\begin{array}{l}\frac{5}{7} + \frac{3}{{17}} = \frac{{85}}{{119}} + \frac{{21}}{{119}}\\ = \frac{{106}}{{119}}\end{array}\)

\(\begin{array}{l}\frac{1}{8} + \frac{6}{{19}} = \frac{{19}}{{152}} + \frac{{48}}{{152}}\\ = \frac{{67}}{{152}}\end{array}\)

\(\begin{array}{l}\frac{3}{5} + \frac{4}{{13}} = \frac{{39}}{{65}} + \frac{{20}}{{65}}\\ = \frac{{59}}{{65}}\end{array}\)

\(\begin{array}{l}\frac{2}{9} + \frac{5}{{11}} = \frac{{22}}{{99}} + \frac{{45}}{{99}}\\ = \frac{{67}}{{99}}\end{array}\)

\(\begin{array}{l}\frac{1}{{12}} + \frac{4}{7} = \frac{7}{{84}} + \frac{{48}}{{84}}\\ = \frac{{55}}{{84}}\end{array}\)

\(\begin{array}{l}\frac{3}{{10}} + \frac{5}{{14}} = \frac{{21}}{{70}} + \frac{{25}}{{70}}\\ = \frac{{46}}{{70}} = \frac{{23}}{{35}}\end{array}\)

\(\begin{array}{l}\frac{2}{3} + \frac{6}{{13}} = \frac{{26}}{{39}} + \frac{{18}}{{39}}\\ = \frac{{44}}{{39}}\end{array}\)

\(\begin{array}{l}\frac{1}{5} + \frac{7}{{16}} = \frac{{16}}{{80}} + \frac{{35}}{{80}}\\ = \frac{{51}}{{80}}\end{array}\)

\(\begin{array}{l}\frac{4}{9} + \frac{2}{{17}} = \frac{{68}}{{153}} + \frac{{18}}{{153}}\\ = \frac{{86}}{{153}}\end{array}\)

\(\begin{array}{l}\frac{3}{{11}} + \frac{5}{8} = \frac{{24}}{{88}} + \frac{{55}}{{88}}\\ = \frac{{79}}{{88}}\end{array}\)

\(\begin{array}{l}\frac{2}{{13}} + \frac{6}{7} = \frac{{14}}{{91}} + \frac{{78}}{{91}}\\ = \frac{{92}}{{91}}\end{array}\)

\(\begin{array}{l}\frac{1}{4} + \frac{5}{{17}} = \frac{{17}}{{68}} + \frac{{20}}{{68}}\\ = \frac{{37}}{{68}}\end{array}\)

\(\begin{array}{l}\frac{3}{7} + \frac{4}{{15}} = \frac{{45}}{{105}} + \frac{{28}}{{105}}\\ = \frac{{73}}{{105}}\end{array}\)

\(\begin{array}{l}\frac{5}{9} + \frac{2}{{11}} = \frac{{55}}{{99}} + \frac{{18}}{{99}}\\ = \frac{{73}}{{99}}\end{array}\)

\(\begin{array}{l}\frac{1}{3} + \frac{7}{{20}} = \frac{{20}}{{60}} + \frac{{21}}{{60}}\\ = \frac{{41}}{{60}}\end{array}\)

\(\begin{array}{l}\frac{4}{5} + \frac{3}{{19}} = \frac{{76}}{{95}} + \frac{{15}}{{95}}\\ = \frac{{91}}{{95}}\end{array}\)

\[\begin{array}{l}\frac{2}{7} + \frac{6}{{17}} = \frac{{34}}{{119}} + \frac{{42}}{{119}}\\ = \frac{{76}}{{119}}\end{array}\]

\(\begin{array}{l}\frac{1}{8} + \frac{4}{9} = \frac{9}{{72}} + \frac{{32}}{{72}}\\ = \frac{{41}}{{72}}\end{array}\)

\(\begin{array}{l}\frac{3}{{13}} + \frac{5}{7} = \frac{{21}}{{91}} + \frac{{65}}{{91}}\\ = \frac{{86}}{{91}}\end{array}\)

\(\begin{array}{l}\frac{2}{5} + \frac{7}{{18}} = \frac{{36}}{{90}} + \frac{{35}}{{90}}\\ = \frac{{71}}{{90}}\end{array}\)

\(\begin{array}{l}\frac{1}{{11}} + \frac{6}{{13}} = \frac{{13}}{{143}} + \frac{{66}}{{143}}\\ = \frac{{79}}{{143}}\end{array}\)

\(\begin{array}{l}\frac{3}{8} + \frac{2}{{15}} = \frac{{45}}{{120}} + \frac{{16}}{{120}}\\ = \frac{{61}}{{120}}\end{array}\)

\[\begin{array}{l}\frac{5}{6} + \frac{3}{{17}} = \frac{{85}}{{102}} + \frac{{18}}{{102}}\\ = \frac{{103}}{{102}}\end{array}\]

\[\begin{array}{l}\frac{2}{9} + \frac{4}{{11}} = \frac{{22}}{{99}} + \frac{{36}}{{99}}\\ = \frac{{58}}{{99}}\end{array}\]

\(\begin{array}{l}\frac{1}{5} + \frac{6}{{19}} = \frac{{19}}{{95}} + \frac{{30}}{{95}}\\ = \frac{{49}}{{95}}\end{array}\)

\(\begin{array}{l}\frac{3}{7} + \frac{5}{{13}} = \frac{{39}}{{91}} + \frac{{35}}{{91}}\\ = \frac{{74}}{{91}}\end{array}\)

\(\begin{array}{l}\frac{2}{3} + \frac{7}{{16}} = \frac{{32}}{{48}} + \frac{{21}}{{48}}\\ = \frac{{53}}{{48}}\end{array}\)

\(\begin{array}{l}\frac{1}{4} + \frac{5}{9} = \frac{9}{{36}} + \frac{{20}}{{36}}\\ = \frac{{29}}{{36}}\end{array}\)