-2.56% is the change from 975 to 950
Calculation steps:
[( 950 - 975 ) ÷ 975] x 100 = -2.56%
Formula
Percentage change = [(950 - 975) / 975] x 100
Subtract the new number by the original number
950 - 975 = -25
-25 ÷ 975 = -0.02564102564102564
-0.02564102564102564 x 100 = -2.56%