-15.24% is the change from 971 to 823
Calculation steps:
[( 823 - 971 ) ÷ 971] x 100 = -15.24%
Formula
Percentage change = [(823 - 971) / 971] x 100
Subtract the new number by the original number
823 - 971 = -148
-148 ÷ 971 = -0.15242018537590113
-0.15242018537590113 x 100 = -15.24%