Question

I need help immidiatly plz.

Answer 1

We know that 15 elves represent the 20% of the total.

Since 20% is one-fifth, the total number of elves is

$15\cdot 5 = 75$

Alternatively, solve the proportion

$15\div x = 20\div 100$

which yields

$x=\dfrac{1500}{20}=75$