Question

Tom is taking a science test and he needs to get 80% of the 20 questions on the test right in order to pass. how many questions must he answer correctly?

Answer 1

16 questions. Each question is worth 5 % 16 ×5 = 80.

Answer 2

The answer:  16 questions.
_______________________________
Note:

80% * 20  =  0.80 * 20  = 0.8 * 20 = 16.0 = 16  .
__________________________________________