478.89% is the change from 90 to 521
Calculation steps:
[( 521 - 90 ) ÷ 90] x 100 = 478.89%
Formula
Percentage change = [(521 - 90) / 90] x 100
Subtract the new number by the original number
521 - 90 = 431
431 ÷ 90 = 4.788888888888889
4.788888888888889 x 100 = 478.89%