689.29% is the change from 84 to 663
Calculation steps:
[( 663 - 84 ) ÷ 84] x 100 = 689.29%
Formula
Percentage change = [(663 - 84) / 84] x 100
Subtract the new number by the original number
663 - 84 = 579
579 ÷ 84 = 6.892857142857143
6.892857142857143 x 100 = 689.29%