a.
$\frac{3}{5}$ = $\frac{3 x 2}{5 x 2}$ = $\frac{6}{10}$
$\frac{3}{5}$ = $\frac{3 x 20}{5 x 20}$ = $\frac{60}{100}$
b.
$\frac{6}{10}$ = 0.6
$\frac{60}{100}$ = 0.06
c. We can write $\frac{3}{5}$ as:
$\frac{6}{10}$ = $\frac{60}{100}$ = $\frac{600}{1000}$ = $\frac{6000}{10000}$ = ...
= 0.6; 0.60; 0.600; 0.6000; 0.60000;....