-87.8% is the change from 82 to 10
Calculation steps:
[( 10 - 82 ) ÷ 82] x 100 = -87.8%
Formula
Percentage change = [(10 - 82) / 82] x 100
Subtract the new number by the original number
10 - 82 = -72
-72 ÷ 82 = -0.8780487804878049
-0.8780487804878049 x 100 = -87.8%