-79.9% is the change from 194 to 39
Calculation steps:
[( 39 - 194 ) ÷ 194] x 100 = -79.9%
Formula
Percentage change = [(39 - 194) / 194] x 100
Subtract the new number by the original number
39 - 194 = -155
-155 ÷ 194 = -0.7989690721649485
-0.7989690721649485 x 100 = -79.9%