-78.81% is the change from 939 to 199
Calculation steps:
[( 199 - 939 ) ÷ 939] x 100 = -78.81%
Formula
Percentage change = [(199 - 939) / 939] x 100
Subtract the new number by the original number
199 - 939 = -740
-740 ÷ 939 = -0.7880724174653887
-0.7880724174653887 x 100 = -78.81%