-80% is the change from 195 to 39
Calculation steps:
[( 39 - 195 ) ÷ 195] x 100 = -80%
Formula
Percentage change = [(39 - 195) / 195] x 100
Subtract the new number by the original number
39 - 195 = -156
-156 ÷ 195 = -0.8
-0.8 x 100 = -80%
Example