1700% is the change from 55 to 990
Calculation steps:
[( 990 - 55 ) ÷ 55] x 100 = 1700%
Formula
Percentage change = [(990 - 55) / 55] x 100
Subtract the new number by the original number
990 - 55 = 935
935 ÷ 55 = 17
17 x 100 = 1700%
Example