Question

I GIVE BRAINLILSTE
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Answer 1

A

Explanation:

He increased by 10% because of 80% to 90% is 10%

So, the Answer is A

Answer 2

12.5%

Explanation:

The question is asking for the percent increase of 80%. So how much of 80% was the new percentage (90%) increased by.

First, find the difference 90-80=10

Then find the percent of 80 that the difference is.

10/80=0.125

0.125 in a percent form is 12.5%

So, there was a 12.5% increase.