0
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20% increase
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75% of 90 = 75% * 90 = 0.75 * 90 = 67.5
75% of 90= 75% * 90= 0.75 * 90= 67.5
It is: (270-75)/75 times 100 = 260% increase
The increase from 50 to 90 is: 80%
It is a 25% increase