-2.05% is the change from 975 to 955
Calculation steps:
[( 955 - 975 ) ÷ 975] x 100 = -2.05%
Formula
Percentage change = [(955 - 975) / 975] x 100
Subtract the new number by the original number
955 - 975 = -20
-20 ÷ 975 = -0.020512820512820513
-0.020512820512820513 x 100 = -2.05%