-7.37% is the change from 950 to 880
Calculation steps:
[( 880 - 950 ) ÷ 950] x 100 = -7.37%
Formula
Percentage change = [(880 - 950) / 950] x 100
Subtract the new number by the original number
880 - 950 = -70
-70 ÷ 950 = -0.07368421052631578
-0.07368421052631578 x 100 = -7.37%