You spent $15, or 75% of your allowance at the mall. How much is your allowance?

You divide 15 by 3, since it is 3/4 of the answer. by doing that, you get 5. so 5 is 1/4 of the answer. then you just add 5 to 3/4, aka 15, to find the total is 20 dollars

75% of x is your allowance

Let's make an equation where 75% of x (0.75x) equals $15.

0.75x = 15

Divide both sides by 0.75.

x = 20

From solving this equation, you find out that your allowance is $20.

Let's check to make sure.

Solve for 75% of $20. Multiply 75% and $20.

0.75 * 20 = 15

This is correct, 75% of $20 is $15, which is how much you spent at the mall. Your answer is $20.