-73.97% is the change from 315 to 82
Calculation steps:
[( 82 - 315 ) ÷ 315] x 100 = -73.97%
Formula
Percentage change = [(82 - 315) / 315] x 100
Subtract the new number by the original number
82 - 315 = -233
-233 ÷ 315 = -0.7396825396825397
-0.7396825396825397 x 100 = -73.97%