620% is the change from 90 to 648
Calculation steps:
[( 648 - 90 ) ÷ 90] x 100 = 620%
Formula
Percentage change = [(648 - 90) / 90] x 100
Subtract the new number by the original number
648 - 90 = 558
558 ÷ 90 = 6.2
6.2 x 100 = 620%
Example