-78.46% is the change from 650 to 140
Calculation steps:
[( 140 - 650 ) ÷ 650] x 100 = -78.46%
Formula
Percentage change = [(140 - 650) / 650] x 100
Subtract the new number by the original number
140 - 650 = -510
-510 ÷ 650 = -0.7846153846153846
-0.7846153846153846 x 100 = -78.46%