​We can solve fractional-part-of-a-number problems by translating the question into an equation and then solving the equation. To translate,

we replace the word is with =
we replace the word of with x

​We can translate percent problems into equations the same way we translate fractional-part-of-a-number problems: we convert the percent to either a fraction or a decimal.

​When finding sales tax, it is easier to turn our percent into a decimal instead of a fraction:

​Daily Challenge #60
Solve A and B:
A. What number is 4/5 of 71?
B. Find the sales tax on a $36.89 radio when the tax rate is 7 percent.