-73.72% is the change from 312 to 82
Calculation steps:
[( 82 - 312 ) ÷ 312] x 100 = -73.72%
Formula
Percentage change = [(82 - 312) / 312] x 100
Subtract the new number by the original number
82 - 312 = -230
-230 ÷ 312 = -0.7371794871794872
-0.7371794871794872 x 100 = -73.72%