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A school assembly had $100$ students in attendance, and $70\%$ of them were first-graders. How many first-graders were at the assembly? $\newline$ $\_\_\_$ first-graders

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Percents of numbers: word problems

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Q. A school assembly had

100

students in attendance, and

70\%

of them were first-graders. How many first-graders were at the assembly?

\newline

\_\_\_

first-graders

Convert to decimal: Step $1$ : Convert $70\%$ to a decimal. $\newline$ $70\% = \frac{70}{100} = 0.70$
Calculate first-graders: Step $2$ : Calculate the number of first-graders. $\newline$ Total students = $100$ $\newline$ Percentage of first-graders = $0.70$ $\newline$ Number of first-graders = $0.70 \times 100$
Perform multiplication: Step $3$ : Perform the multiplication to find the number of first-graders. $0.70 \times 100 = 70$

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