Answer:
1/ 2.2% per minute
2/ 35 minutes
Explanation:
For the first question
We take 89% - 23% = 66%
Then take 66% divided by 30 minutes = 2.2% per minute
For the second question
We take 100% - 23% = 77%
Then take 77 divided by 2.2 = 35 minutes
It takes 35 minutes to charge fully!