-85.37% is the change from 82 to 12
Calculation steps:
[( 12 - 82 ) ÷ 82] x 100 = -85.37%
Formula
Percentage change = [(12 - 82) / 82] x 100
Subtract the new number by the original number
12 - 82 = -70
-70 ÷ 82 = -0.8536585365853658
-0.8536585365853658 x 100 = -85.37%