588.89% is the change from 90 to 620
Calculation steps:
[( 620 - 90 ) ÷ 90] x 100 = 588.89%
Formula
Percentage change = [(620 - 90) / 90] x 100
Subtract the new number by the original number
620 - 90 = 530
530 ÷ 90 = 5.888888888888889
5.888888888888889 x 100 = 588.89%