Question

percents
writing a ratio as a percentage without a calculator
lamar is riding on a bike course that is 70 miles long. so far, he has ridden 21 miles of the course. what percentage of the course has lamar ridden so far?
%
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Explanation:

Step1: Set up the ratio

$\frac{21}{70}$

Step2: Simplify the fraction

$\frac{21\div7}{70\div7} = \frac{3}{10}$

Step3: Convert to percentage

$\frac{3}{10} \times 100\% = 30\%$

Answer:

30