790.12% is the change from 81 to 721
Calculation steps:
[( 721 - 81 ) ÷ 81] x 100 = 790.12%
Formula
Percentage change = [(721 - 81) / 81] x 100
Subtract the new number by the original number
721 - 81 = 640
640 ÷ 81 = 7.901234567901234
7.901234567901234 x 100 = 790.12%