Question

What is the number if 80% of 50% of it is 0.72?

Answer 1

So let's call our original number $x.$

To take $80\%$ of $50\%$ of $x$ what we have done is multiply first by $0.5$ and then by $0.8$. Hence,

$0.72=0.8\times 0.5\times x$

$\Rightarrow x=\frac{0.72}{0.8\times 0.5}$

$\therefore x=1.8$