Question

Mrs Bennett has graded 20% of her 150 student's papers.How many papers does she have left to grade?

Answer 1

R= left papers. r=150-20%×150=150-0.2×150=0.8×150=120 There are 120 papers left.

Answer 2

20% of 150 are done
0.2 * 150 = 30
150 - 30 are remaining
120 are remaining