-98.15% is the change from 971 to 18
Calculation steps:
[( 18 - 971 ) ÷ 971] x 100 = -98.15%
Formula
Percentage change = [(18 - 971) / 971] x 100
Subtract the new number by the original number
18 - 971 = -953
-953 ÷ 971 = -0.9814624098867147
-0.9814624098867147 x 100 = -98.15%