-17.17% is the change from 99 to 82
Calculation steps:
[( 82 - 99 ) ÷ 99] x 100 = -17.17%
Formula
Percentage change = [(82 - 99) / 99] x 100
Subtract the new number by the original number
82 - 99 = -17
-17 ÷ 99 = -0.1717171717171717
-0.1717171717171717 x 100 = -17.17%