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A store pays $\$19$ for a math book and marks the price up by $45\%$ . What is the amount of the mark-up? $\newline$ $\$$ _____

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Percent of a number: tax, discount, and more

Full solution

Q. A store pays

\$19

for a math book and marks the price up by

45\%

. What is the amount of the mark-up?

\newline

\$

_____

Convert to Decimal: Question_prompt: How much is the mark-up on the math book?
Calculate Mark-up: First, convert $45\%$ to a decimal by dividing by $100$ . $\newline$ $45 \div 100 = 0.45$
Final Mark-up Calculation: Next, calculate the mark-up by multiplying the store's cost by the mark-up rate. $\newline$ Mark-up = $\$19 \times 0.45$ $\newline$ Mark-up = $\$8.55$

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