753.09% is the change from 81 to 691
Calculation steps:
[( 691 - 81 ) ÷ 81] x 100 = 753.09%
Formula
Percentage change = [(691 - 81) / 81] x 100
Subtract the new number by the original number
691 - 81 = 610
610 ÷ 81 = 7.530864197530864
7.530864197530864 x 100 = 753.09%