On his last four tests, Danib scored 55%, 78%, 84% and 93%. What score should he get on his next text so that his average on all five tests are 80%?

Answer 1

5 tests at 80 pts each makes 400 points
So, add up the points so far, and see what more is needed.

Answer 2

90 %

Answer 3

where did you get 400 from?