-1.9% is the change from 949 to 931
Calculation steps:
[( 931 - 949 ) ÷ 949] x 100 = -1.9%
Formula
Percentage change = [(931 - 949) / 949] x 100
Subtract the new number by the original number
931 - 949 = -18
-18 ÷ 949 = -0.018967334035827187
-0.018967334035827187 x 100 = -1.9%