-78.62% is the change from 650 to 139
Calculation steps:
[( 139 - 650 ) ÷ 650] x 100 = -78.62%
Formula
Percentage change = [(139 - 650) / 650] x 100
Subtract the new number by the original number
139 - 650 = -511
-511 ÷ 650 = -0.7861538461538462
-0.7861538461538462 x 100 = -78.62%