-4.19% is the change from 955 to 915
Calculation steps:
[( 915 - 955 ) ÷ 955] x 100 = -4.19%
Formula
Percentage change = [(915 - 955) / 955] x 100
Subtract the new number by the original number
915 - 955 = -40
-40 ÷ 955 = -0.041884816753926704
-0.041884816753926704 x 100 = -4.19%