Question

Mark charged a battery. Each minute, the percentage of the battery’s capacity that was charged increased by 2.5 percent. After 17 minutes of charging, the battery was 61.5 percent full. How full was the battery when charging began? How long from the time Mark start charging did it take the battery to be fully charged?

Answer 1

Answer: 19%

Step-by-step explanation:

You take 17 times 2.5 which you get 42.5 which is so you know how much the battery has charged. You then take the 61.5 minus 42.5 and which is 19