Question

Simplify 5/7r-2/7r......

Answer 1

$\frac{5}{7r}-\frac{2}{7r}$

You have two fractions with the same (common) denominator, so you subtract the numerators and put that over the common denominator.

$\frac{5}{7r}-\frac{2}{7r}=\frac{5-2}{7r}=\frac{3}{7r}$