-79.69% is the change from 192 to 39
Calculation steps:
[( 39 - 192 ) ÷ 192] x 100 = -79.69%
Formula
Percentage change = [(39 - 192) / 192] x 100
Subtract the new number by the original number
39 - 192 = -153
-153 ÷ 192 = -0.796875
-0.796875 x 100 = -79.69%