i. 72, 60
Ratio =\(\frac{72}{60}\) =\(\frac{12\times6}{12\times5}
\) = \(\frac{6}{5}\) = 6 : 5
ii. 38, 57
Ratio =\(\frac{38}{57}\) =\(\frac{19\times2}{19\times3}
\) = \(\frac{2}{3}\) = 2 : 3
iii. 52, 78
Ratio =\(\frac{52}{78}\) =\(\frac{26\times2}{26\times3}
\) = \(\frac{2}{3}\) = 2 : 3