What is 100 increased by 20%?

100 increased by 20% is 120. Calculate 20% of 100 = 20, then add that from 100: 100 + 20 = 120.

How do you calculate a percentage increase?

Multiply the original value by the percentage and divide by 100 to get the change amount. Then add it from the original. For 20% increase of 100: 100 × 0.2 = 20, then 100 + 20 = 120.

Quick Answer

20% Increase of 100

120

100 + 20 = 120

How to Calculate 20% Increase of 100

To find a percentage increase, first calculate the change amount, then add it to the original value.

Step 1 — Find the change100 × 0.2 = 20

Step 2 — Add the change100 + 20 = 120

Answer20% increase of 100 = 120

Alternatively: 100 × (1 + 0.2) = 100 × 1.2 = 120.

Other Percentage Increases of 100

Change %	Base	Result
5%	100	105
10%	100	110
15%	100	115
20% ← you are here	100	120
25%	100	125
30%	100	130
40%	100	140
50%	100	150
75%	100	175
100%	100	200

Looking for the opposite? 20% decrease of 100

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