Question

 13 supra 75 - 3 supra 50
315 supra 45 - 157 supra 30

Answer 1

$\frac{13}{75} - \frac{3}{50} = \frac{26}{150} - \frac{9}{150} = \frac{15}{150} = \frac{1}{10}$

$\frac{315}{45} - \frac{157}{30} = \frac{630}{90} - \frac{471}{90} = \frac{159}{90} = \frac{53}{30}$