-20.31% is the change from 650 to 518
Calculation steps:
[( 518 - 650 ) ÷ 650] x 100 = -20.31%
Formula
Percentage change = [(518 - 650) / 650] x 100
Subtract the new number by the original number
518 - 650 = -132
-132 ÷ 650 = -0.20307692307692307
-0.20307692307692307 x 100 = -20.31%