-79.66% is the change from 939 to 191
Calculation steps:
[( 191 - 939 ) ÷ 939] x 100 = -79.66%
Formula
Percentage change = [(191 - 939) / 939] x 100
Subtract the new number by the original number
191 - 939 = -748
-748 ÷ 939 = -0.7965921192758253
-0.7965921192758253 x 100 = -79.66%