-98.46% is the change from 650 to 10
Calculation steps:
[( 10 - 650 ) ÷ 650] x 100 = -98.46%
Formula
Percentage change = [(10 - 650) / 650] x 100
Subtract the new number by the original number
10 - 650 = -640
-640 ÷ 650 = -0.9846153846153847
-0.9846153846153847 x 100 = -98.46%