-89.35% is the change from 939 to 100
Calculation steps:
[( 100 - 939 ) ÷ 939] x 100 = -89.35%
Formula
Percentage change = [(100 - 939) / 939] x 100
Subtract the new number by the original number
100 - 939 = -839
-839 ÷ 939 = -0.8935037273695421
-0.8935037273695421 x 100 = -89.35%