-4.12% is the change from 970 to 930
Calculation steps:
[( 930 - 970 ) ÷ 970] x 100 = -4.12%
Formula
Percentage change = [(930 - 970) / 970] x 100
Subtract the new number by the original number
930 - 970 = -40
-40 ÷ 970 = -0.041237113402061855
-0.041237113402061855 x 100 = -4.12%