Question

Patrica scored 80% on a math test. She missed 4 problems. How many problems were on the test?

Answer 1

20

Explanation:

Patrica got 80% correct. She missed 4 problems, so that must have been the remaining 20% of the test.

Therefore:

4 = 20% x

Percent means out of 100, so:

4 = (20/100) x

4 = 1/5 x

x = 20

There were 20 problems on the test.