-3.9% is the change from 949 to 912
Calculation steps:
[( 912 - 949 ) ÷ 949] x 100 = -3.9%
Formula
Percentage change = [(912 - 949) / 949] x 100
Subtract the new number by the original number
912 - 949 = -37
-37 ÷ 949 = -0.03898840885142255
-0.03898840885142255 x 100 = -3.9%