551.85% is the change from 81 to 528
Calculation steps:
[( 528 - 81 ) ÷ 81] x 100 = 551.85%
Formula
Percentage change = [(528 - 81) / 81] x 100
Subtract the new number by the original number
528 - 81 = 447
447 ÷ 81 = 5.518518518518518
5.518518518518518 x 100 = 551.85%