-7.69% is the change from 650 to 600
Calculation steps:
[( 600 - 650 ) ÷ 650] x 100 = -7.69%
Formula
Percentage change = [(600 - 650) / 650] x 100
Subtract the new number by the original number
600 - 650 = -50
-50 ÷ 650 = -0.07692307692307693
-0.07692307692307693 x 100 = -7.69%