429.68% is the change from 155 to 821
Calculation steps:
[( 821 - 155 ) ÷ 155] x 100 = 429.68%
Formula
Percentage change = [(821 - 155) / 155] x 100
Subtract the new number by the original number
821 - 155 = 666
666 ÷ 155 = 4.296774193548387
4.296774193548387 x 100 = 429.68%