-98.76% is the change from 971 to 12
Calculation steps:
[( 12 - 971 ) ÷ 971] x 100 = -98.76%
Formula
Percentage change = [(12 - 971) / 971] x 100
Subtract the new number by the original number
12 - 971 = -959
-959 ÷ 971 = -0.9876416065911432
-0.9876416065911432 x 100 = -98.76%