-18.81% is the change from 101 to 82
Calculation steps:
[( 82 - 101 ) ÷ 101] x 100 = -18.81%
Formula
Percentage change = [(82 - 101) / 101] x 100
Subtract the new number by the original number
82 - 101 = -19
-19 ÷ 101 = -0.18811881188118812
-0.18811881188118812 x 100 = -18.81%