-14.87% is the change from 975 to 830
Calculation steps:
[( 830 - 975 ) ÷ 975] x 100 = -14.87%
Formula
Percentage change = [(830 - 975) / 975] x 100
Subtract the new number by the original number
830 - 975 = -145
-145 ÷ 975 = -0.14871794871794872
-0.14871794871794872 x 100 = -14.87%