723.46% is the change from 81 to 667
Calculation steps:
[( 667 - 81 ) ÷ 81] x 100 = 723.46%
Formula
Percentage change = [(667 - 81) / 81] x 100
Subtract the new number by the original number
667 - 81 = 586
586 ÷ 81 = 7.234567901234568
7.234567901234568 x 100 = 723.46%