640.96% is the change from 83 to 615
Calculation steps:
[( 615 - 83 ) ÷ 83] x 100 = 640.96%
Formula
Percentage change = [(615 - 83) / 83] x 100
Subtract the new number by the original number
615 - 83 = 532
532 ÷ 83 = 6.409638554216867
6.409638554216867 x 100 = 640.96%