700% is the change from 83 to 664
Calculation steps:
[( 664 - 83 ) ÷ 83] x 100 = 700%
Formula
Percentage change = [(664 - 83) / 83] x 100
Subtract the new number by the original number
664 - 83 = 581
581 ÷ 83 = 7
7 x 100 = 700%
Example