-2.38% is the change from 84 to 82
Calculation steps:
[( 82 - 84 ) ÷ 84] x 100 = -2.38%
Formula
Percentage change = [(82 - 84) / 84] x 100
Subtract the new number by the original number
82 - 84 = -2
-2 ÷ 84 = -0.023809523809523808
-0.023809523809523808 x 100 = -2.38%