Answer:
The answer is 30
Step-by-step explanation:
Given:
21 is 70%of ___
Let, [tex]x[/tex] in the place of blank to solve.
So,
[tex]21=\frac{70}{100}\times x\\ 21=\frac{70x}{100}[/tex].
Multiply both sides by [tex]100[/tex].
[tex]21\times100=\frac{70x}{100}\times100\\2100=70x[/tex].
Now, dividing both sides by [tex]70[/tex].
[tex]\frac{2100}{70}=\frac{70x}{70}\\30=x[/tex].
So, the value of [tex]x=30[/tex].
Therefore, the answer is 30.
