# 145% of what number is 870?

Jan 5, 2018

600

#### Explanation:

To rephrase the question, it states that 145% of x = 870

X being the unknown number.

Let's convert percentage to decimal first

(145%)/100=1.45

So $1.45 \cdot X = 870$

$1.45 X = 870$

We would want to isolate X to find the unknown number.

$\frac{1.45 X}{1.45} = \frac{870}{1.45}$

$X = 600$

The unknown number is therefore 600.

To check:
145% of $600 = 1.45 \cdot 600 = 870$