674.7% is the change from 83 to 643
Calculation steps:
[( 643 - 83 ) ÷ 83] x 100 = 674.7%
Formula
Percentage change = [(643 - 83) / 83] x 100
Subtract the new number by the original number
643 - 83 = 560
560 ÷ 83 = 6.746987951807229
6.746987951807229 x 100 = 674.7%