-28.42% is the change from 950 to 680
Calculation steps:
[( 680 - 950 ) ÷ 950] x 100 = -28.42%
Formula
Percentage change = [(680 - 950) / 950] x 100
Subtract the new number by the original number
680 - 950 = -270
-270 ÷ 950 = -0.28421052631578947
-0.28421052631578947 x 100 = -28.42%