-90.24% is the change from 82 to 8
Calculation steps:
[( 8 - 82 ) ÷ 82] x 100 = -90.24%
Formula
Percentage change = [(8 - 82) / 82] x 100
Subtract the new number by the original number
8 - 82 = -74
-74 ÷ 82 = -0.9024390243902439
-0.9024390243902439 x 100 = -90.24%