-88.24% is the change from 102 to 12
Calculation steps:
[( 12 - 102 ) ÷ 102] x 100 = -88.24%
Formula
Percentage change = [(12 - 102) / 102] x 100
Subtract the new number by the original number
12 - 102 = -90
-90 ÷ 102 = -0.8823529411764706
-0.8823529411764706 x 100 = -88.24%