19 is 7.82% of 243.
Step 1: Translate the words into an equation.
19 | is | what percent | of | 243 |
19 | = | x | $ \cdot $ | 243 |
Step 2: Solve for $ x $.
$$ \begin{aligned} 19 &= x \cdot 243 \\[1.2 em] 243 \cdot x &= 19 \\[1.2 em] x &= \dfrac{ 19 }{ 243 } \\[1.2 em] x &= 0.0782 \end{aligned} $$Step 3: Express $ x $ as a percentage.
$$ x = 0.0782 = 0.0782 ~~\cdot~~ 100 \% = 7.82 \% $$