Question

axine spent 15 hours doing her homework last week. this week she spent 18 hours doing homework. she says that she spent 120% more time doing homework this week. is she correct? show your work to justify your decision.

Answer 1

Yes, she is correct. If she did 100% of the work time, it would be 15 hours, so instead of multiplying by 1, we multiply by 1.2. 15 times 1.2 is infact 18. So she is justified in saying that she spent 120% more time this week.