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

Aug 25, 2017

$x = 1.8$

Explanation:

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,

$0.72 = 0.8 \cdot 0.5 \cdot x$

$\implies x = \frac{0.72}{0.8 \cdot 0.5}$

$\therefore x = 1.8$