-0.1% is the change from 971 to 970
Calculation steps:
[( 970 - 971 ) ÷ 971] x 100 = -0.1%
Formula
Percentage change = [(970 - 971) / 971] x 100
Subtract the new number by the original number
970 - 971 = -1
-1 ÷ 971 = -0.0010298661174047373
-0.0010298661174047373 x 100 = -0.1%