-86.51% is the change from 971 to 131
Calculation steps:
[( 131 - 971 ) ÷ 971] x 100 = -86.51%
Formula
Percentage change = [(131 - 971) / 971] x 100
Subtract the new number by the original number
131 - 971 = -840
-840 ÷ 971 = -0.8650875386199794
-0.8650875386199794 x 100 = -86.51%