140 is 31.18% of 449.
Step 1: Translate the words into an equation.
140 | is | what percent | of | 449 |
140 | = | x | $ \cdot $ | 449 |
Step 2: Solve for $ x $.
$$ \begin{aligned} 140 &= x \cdot 449 \\[1.2 em] 449 \cdot x &= 140 \\[1.2 em] x &= \dfrac{ 140 }{ 449 } \\[1.2 em] x &= 0.3118 \end{aligned} $$Step 3: Express $ x $ as a percentage.
$$ x = 0.3118 = 0.3118 ~~\cdot~~ 100 \% = 31.18 \% $$