-21.19% is the change from 656 to 517
Calculation steps:
[( 517 - 656 ) ÷ 656] x 100 = -21.19%
Formula
Percentage change = [(517 - 656) / 656] x 100
Subtract the new number by the original number
517 - 656 = -139
-139 ÷ 656 = -0.21189024390243902
-0.21189024390243902 x 100 = -21.19%