-79.79% is the change from 193 to 39
Calculation steps:
[( 39 - 193 ) ÷ 193] x 100 = -79.79%
Formula
Percentage change = [(39 - 193) / 193] x 100
Subtract the new number by the original number
39 - 193 = -154
-154 ÷ 193 = -0.7979274611398963
-0.7979274611398963 x 100 = -79.79%