-91.04% is the change from 971 to 87
Calculation steps:
[( 87 - 971 ) ÷ 971] x 100 = -91.04%
Formula
Percentage change = [(87 - 971) / 971] x 100
Subtract the new number by the original number
87 - 971 = -884
-884 ÷ 971 = -0.9104016477857878
-0.9104016477857878 x 100 = -91.04%