a.

$\frac{162}{10}$ = 16 $\frac{2}{10}$

$\frac{734}{10}$ = 73  $\frac{4}{10}$

$\frac{5608}{100}$ = 56 $\frac{8}{100}$

$\frac{605}{100}$ = 6 $\frac{5}{100}$

b. 

16 $\frac{2}{10}$ = 16.2

73  $\frac{4}{10}$ = 73.4

56 $\frac{8}{100}$ = 56.08 

6 $\frac{5}{100}$ = 6.05