-2.34% is the change from 939 to 917
Calculation steps:
[( 917 - 939 ) ÷ 939] x 100 = -2.34%
Formula
Percentage change = [(917 - 939) / 939] x 100
Subtract the new number by the original number
917 - 939 = -22
-22 ÷ 939 = -0.023429179978700747
-0.023429179978700747 x 100 = -2.34%