541.98% is the change from 81 to 520
Calculation steps:
[( 520 - 81 ) ÷ 81] x 100 = 541.98%
Formula
Percentage change = [(520 - 81) / 81] x 100
Subtract the new number by the original number
520 - 81 = 439
439 ÷ 81 = 5.419753086419753
5.419753086419753 x 100 = 541.98%