-86.79% is the change from 939 to 124
Calculation steps:
[( 124 - 939 ) ÷ 939] x 100 = -86.79%
Formula
Percentage change = [(124 - 939) / 939] x 100
Subtract the new number by the original number
124 - 939 = -815
-815 ÷ 939 = -0.8679446219382322
-0.8679446219382322 x 100 = -86.79%