Question

Mrs.Bennett has graded 20% of her 150 students papers. How many papers does she still need to finish?

Answer 1

If she has finished 20%, she still has 80% to do. So just calculate .8 times 150.

Answer 2

80% more
80/100 simplify = 4/5
4/5 of 150 = 120
She has to grade 120 more