Question

If 2994 ÷ 14.5 = 172, then 29.94 ÷ 1.45 = ?

Answer 1

2994/14.5=2994×10/4.5×10
29940/45
172

2994/145
17.2

Answer 2

$\frac{2994}{14.5}$ = 172

Now to find,$\frac{29.94}{1.45}$

To find it using easy method, we need to change the second form to the first one,
For this multiply and divide, the numerator with 100, and multiply and divide the denominator with 10

We get
$\frac{29.94*100/100}{1.45*10/10}$ = $\frac{2994/100}{14.5/10}$
=$\frac{2994}{14.5}* \frac{1}{10}$

And we know, 
$\frac{2994}{14.5}$ = 172

So,
$\frac{2994}{14.5}* \frac{1}{10}$ = $\frac{172}{10}$ =17.2