-48.75% is the change from 80 to 41
Calculation steps:
[( 41 - 80 ) ÷ 80] x 100 = -48.75%
Formula
Percentage change = [(41 - 80) / 80] x 100
Subtract the new number by the original number
41 - 80 = -39
-39 ÷ 80 = -0.4875
-0.4875 x 100 = -48.75%
Example