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Exercises Numbers, fractions and percents

Example 6.14 from Prealgebra, 6.2 Solve General Applications of Percent

Solve General Applications of Percent: example 6.14

What number is $35%$ of $90 ?$

Work it out on paper first. Then open the solution one step at a time, and stop as soon as you can finish on your own.

Solution

Translate into algebra. Let $n =$ the number.

Multiply.

$31.5$ is $35%$ of $90$

Your turn

The book's Try It right after this example: same idea, new numbers. Only the answer is given.

What number is $45%$ of $80 ?$

How did it go?

PreviousUnderstand Percent: example 6.13 Next Solve General Applications of Percent: example 6.15

From Prealgebra (1st edition) by OpenStax (Rice University), section 6.2, licensed under CC BY 4.0. Original at openstax.org. We split the solution into steps; the words, numbers and figures are the book's. OpenStax doesn't endorse this site.