-14.52% is the change from 971 to 830
Calculation steps:
[( 830 - 971 ) ÷ 971] x 100 = -14.52%
Formula
Percentage change = [(830 - 971) / 971] x 100
Subtract the new number by the original number
830 - 971 = -141
-141 ÷ 971 = -0.14521112255406798
-0.14521112255406798 x 100 = -14.52%