490% is the change from 90 to 531
Calculation steps:
[( 531 - 90 ) ÷ 90] x 100 = 490%
Formula
Percentage change = [(531 - 90) / 90] x 100
Subtract the new number by the original number
531 - 90 = 441
441 ÷ 90 = 4.9
4.9 x 100 = 490%
Example