Question

Jo has a 15 GB monthly cell phone plan. Jo has used 4 GB in the first 20 days of the month. At that rate, how many GB will Jo use after a month of 30 days?

Answer 1

6 GB

Explanation:

First find the rate per day. You can do that by dividing 4GB by 20 days.

4/20 = 1/5 = 0.2GB per day

Then, just multiply 30 days by the rate of 0.2GB/day.

30 x 0.2 = 6