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Erica read 160 pages of her book. if she is 40% of the way done, how many pages are there in the whole book?

Apr 2, 2020

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If 160 pages are 40% of the book

then x pages are 100% of the book

Thus in ratio form:

$$160:40$$%

$$x:100%$$%

Same as:

$$\frac{160}{0.4}=\frac{x}{1}$$

$$x=\frac{160}{0.4}=400 pages$$

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Apr 2, 2020
edited by Guest  Apr 2, 2020