-22.92% is the change from 650 to 501
Calculation steps:
[( 501 - 650 ) ÷ 650] x 100 = -22.92%
Formula
Percentage change = [(501 - 650) / 650] x 100
Subtract the new number by the original number
501 - 650 = -149
-149 ÷ 650 = -0.22923076923076924
-0.22923076923076924 x 100 = -22.92%