75 percents of 20 is 15?
Step 1: Translate the words into an equation.
75 percents | of | what | is | 15 |
75% | $ \cdot $ | x | = | 15 |
Step 2: Express $ 75% $ as a decimal number.
$$ 80\% = 80 \div 100 = 0.75$$Step 3: Solve for $ x $.
$$ \begin{aligned} 0.75 \cdot x &= 15 \\[1.2 em] x &= \dfrac{ 15 }{ 0.75 } \\[1.2 em] x &= 20 \end{aligned} $$