-86.05% is the change from 939 to 131
Calculation steps:
[( 131 - 939 ) ÷ 939] x 100 = -86.05%
Formula
Percentage change = [(131 - 939) / 939] x 100
Subtract the new number by the original number
131 - 939 = -808
-808 ÷ 939 = -0.8604898828541001
-0.8604898828541001 x 100 = -86.05%