Question

If I have 90 crates of apples and I sell 72 what percent is left

Answer 1

The number of crates of apples left is 90 - 72 = 18

90 crates of apples represent 100%.

To find what percent represent 18 crates of apples, we can use the next proportion:

$\frac{90\text{ crates of apples}}{18\text{ crates of apples}}=\frac{100\text{ \%}}{x\text{ \%}}$

Solving for x:

$\begin{gathered} 90\cdot x=100\cdot18 \\ x=\frac{1800}{90} \\ x=20 \end{gathered}$

20 % is left