-20.15% is the change from 650 to 519
Calculation steps:
[( 519 - 650 ) ÷ 650] x 100 = -20.15%
Formula
Percentage change = [(519 - 650) / 650] x 100
Subtract the new number by the original number
519 - 650 = -131
-131 ÷ 650 = -0.20153846153846153
-0.20153846153846153 x 100 = -20.15%