-87.23% is the change from 321 to 41
Calculation steps:
[( 41 - 321 ) ÷ 321] x 100 = -87.23%
Formula
Percentage change = [(41 - 321) / 321] x 100
Subtract the new number by the original number
41 - 321 = -280
-280 ÷ 321 = -0.8722741433021807
-0.8722741433021807 x 100 = -87.23%