-87.75% is the change from 939 to 115
Calculation steps:
[( 115 - 939 ) ÷ 939] x 100 = -87.75%
Formula
Percentage change = [(115 - 939) / 939] x 100
Subtract the new number by the original number
115 - 939 = -824
-824 ÷ 939 = -0.8775292864749734
-0.8775292864749734 x 100 = -87.75%