Question

Chau is riding on a bike course that is 80 miles long. So far, he has ridden 64 miles of the course. What percentage of the course has Chau ridden so far?

Answer 1

Let the percentage be x%,

then,

x% of 80 = 64

`(x)/(100) * 80 = 64 \\ (x)/(10) * 8 = 64 \\ (x)/(10) = (64)/(8) \\ x = 8 * 10 = 80 \%`

He has ridden 80% of the total bike course.

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