-7.74% is the change from 646 to 596
Calculation steps:
[( 596 - 646 ) ÷ 646] x 100 = -7.74%
Formula
Percentage change = [(596 - 646) / 646] x 100
Subtract the new number by the original number
596 - 646 = -50
-50 ÷ 646 = -0.07739938080495357
-0.07739938080495357 x 100 = -7.74%