Question

I was given this problem in math and can’t figure out how it’s solved. 21 is 70%of ___?

Answer 1

Answer:

The answer is 30

Step-by-step explanation:

Given:

21 is 70%of ___

Let, $x$ in the place of blank to solve.

So,

$21=\frac{70}{100}\times x\\ 21=\frac{70x}{100}$.

Multiply both sides by $100$.

$21\times100=\frac{70x}{100}\times100\\2100=70x$.

Now, dividing both sides by $70$.

$\frac{2100}{70}=\frac{70x}{70}\\30=x$.

So, the value of $x=30$.

Therefore, the answer is 30.