696.39% is the change from 83 to 661
Calculation steps:
[( 661 - 83 ) ÷ 83] x 100 = 696.39%
Formula
Percentage change = [(661 - 83) / 83] x 100
Subtract the new number by the original number
661 - 83 = 578
578 ÷ 83 = 6.963855421686747
6.963855421686747 x 100 = 696.39%