-3.17% is the change from 947 to 917
Calculation steps:
[( 917 - 947 ) ÷ 947] x 100 = -3.17%
Formula
Percentage change = [(917 - 947) / 947] x 100
Subtract the new number by the original number
917 - 947 = -30
-30 ÷ 947 = -0.03167898627243928
-0.03167898627243928 x 100 = -3.17%