The increase would be 11, from 55 to 66.
20% of 55 = 0.20 x 55 = 11
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55 percent = 55/100 = 11/20
263.6364% increase.
Expressed as a proper fraction in its simplest form, 55 percent is equal to 11/20 or eleven twentieths.
55
The amount of increase is 20. The percent increase is 20/100 X 100 = 20%