-86.05% is the change from 86 to 12
Calculation steps:
[( 12 - 86 ) ÷ 86] x 100 = -86.05%
Formula
Percentage change = [(12 - 86) / 86] x 100
Subtract the new number by the original number
12 - 86 = -74
-74 ÷ 86 = -0.8604651162790697
-0.8604651162790697 x 100 = -86.05%