-87.19% is the change from 320 to 41
Calculation steps:
[( 41 - 320 ) ÷ 320] x 100 = -87.19%
Formula
Percentage change = [(41 - 320) / 320] x 100
Subtract the new number by the original number
41 - 320 = -279
-279 ÷ 320 = -0.871875
-0.871875 x 100 = -87.19%