\(\frac{15-\frac{15}{7}-\frac{15}{12}}{3-\frac{3}{7}-\frac{3}{12}}\)
= \(\frac{15.\left(1-\frac{1}{7}-\frac{1}{12}\right)}{3.\left(1-\frac{1}{7}-\frac{1}{12}\right)}\)
= \(\frac{15}{3}\)
= 5
15-\(\frac{15}{7}\)-\(\frac{15}{12}\)
3-\(\frac{3}{7}\)-\(\frac{3}{12}\)
=15.[1-\(\frac{1}{7}\)-\(\frac{1}{12}\)]
3.[1-\(\frac{1}{7}\)-\(\frac{1}{12}\)]
=\(\frac{15}{3}\)=5