-79.55% is the change from 939 to 192
Calculation steps:
[( 192 - 939 ) ÷ 939] x 100 = -79.55%
Formula
Percentage change = [(192 - 939) / 939] x 100
Subtract the new number by the original number
192 - 939 = -747
-747 ÷ 939 = -0.7955271565495208
-0.7955271565495208 x 100 = -79.55%