-0.84% is the change from 947 to 939
Calculation steps:
[( 939 - 947 ) ÷ 947] x 100 = -0.84%
Formula
Percentage change = [(939 - 947) / 947] x 100
Subtract the new number by the original number
939 - 947 = -8
-8 ÷ 947 = -0.008447729672650475
-0.008447729672650475 x 100 = -0.84%