Question

After 20 mins Juan had completed 12 questions which is .7 of his assignments. What percent of the assignment had Juan not completed?

Answer 1

well, if 0.7= 70 %
100- 70= 30

Answer 2

All you gotta do is multiply .7 by 100 which gives you 70
so subtract 70 from 100 which is 30
he had not completed 30% of his assignment

hope this helped :)