-9.47% is the change from 971 to 879
Calculation steps:
[( 879 - 971 ) ÷ 971] x 100 = -9.47%
Formula
Percentage change = [(879 - 971) / 971] x 100
Subtract the new number by the original number
879 - 971 = -92
-92 ÷ 971 = -0.09474768280123584
-0.09474768280123584 x 100 = -9.47%