-3.1% is the change from 969 to 939
Calculation steps:
[( 939 - 969 ) ÷ 969] x 100 = -3.1%
Formula
Percentage change = [(939 - 969) / 969] x 100
Subtract the new number by the original number
939 - 969 = -30
-30 ÷ 969 = -0.030959752321981424
-0.030959752321981424 x 100 = -3.1%