511.11% is the change from 90 to 550
Calculation steps:
[( 550 - 90 ) ÷ 90] x 100 = 511.11%
Formula
Percentage change = [(550 - 90) / 90] x 100
Subtract the new number by the original number
550 - 90 = 460
460 ÷ 90 = 5.111111111111111
5.111111111111111 x 100 = 511.11%