428.28% is the change from 99 to 523
Calculation steps:
[( 523 - 99 ) ÷ 99] x 100 = 428.28%
Formula
Percentage change = [(523 - 99) / 99] x 100
Subtract the new number by the original number
523 - 99 = 424
424 ÷ 99 = 4.282828282828283
4.282828282828283 x 100 = 428.28%