-22% is the change from 650 to 507
Calculation steps:
[( 507 - 650 ) ÷ 650] x 100 = -22%
Formula
Percentage change = [(507 - 650) / 650] x 100
Subtract the new number by the original number
507 - 650 = -143
-143 ÷ 650 = -0.22
-0.22 x 100 = -22%
Example