445.56% is the change from 90 to 491
Calculation steps:
[( 491 - 90 ) ÷ 90] x 100 = 445.56%
Formula
Percentage change = [(491 - 90) / 90] x 100
Subtract the new number by the original number
491 - 90 = 401
401 ÷ 90 = 4.455555555555556
4.455555555555556 x 100 = 445.56%