Question

11/169+17/91=?
73/140+125/196=?

Answer 1

$frac{11}{169} + frac{17}{91} = frac{11}{13*13} + frac{17}{13*7} = frac{11*7+17*13}{13*13*7}= frac{77+221}{169*7}=frac{298}{1183}$

$frac{73}{140} + frac{125}{196} = frac{73}{14*10} + frac{125}{14*14} = frac{73*14+125*10}{14*14*10} =frac{1022+1250}{196*10} =frac{2272}{1960} = frac{284}{245}$