-10.21% is the change from 970 to 871
Calculation steps:
[( 871 - 970 ) ÷ 970] x 100 = -10.21%
Formula
Percentage change = [(871 - 970) / 970] x 100
Subtract the new number by the original number
871 - 970 = -99
-99 ÷ 970 = -0.10206185567010309
-0.10206185567010309 x 100 = -10.21%