-60% is the change from 650 to 260
Calculation steps:
[( 260 - 650 ) ÷ 650] x 100 = -60%
Formula
Percentage change = [(260 - 650) / 650] x 100
Subtract the new number by the original number
260 - 650 = -390
-390 ÷ 650 = -0.6
-0.6 x 100 = -60%
Example