-87.54% is the change from 971 to 121
Calculation steps:
[( 121 - 971 ) ÷ 971] x 100 = -87.54%
Formula
Percentage change = [(121 - 971) / 971] x 100
Subtract the new number by the original number
121 - 971 = -850
-850 ÷ 971 = -0.8753861997940268
-0.8753861997940268 x 100 = -87.54%