-46.25% is the change from 80 to 43
Calculation steps:
[( 43 - 80 ) ÷ 80] x 100 = -46.25%
Formula
Percentage change = [(43 - 80) / 80] x 100
Subtract the new number by the original number
43 - 80 = -37
-37 ÷ 80 = -0.4625
-0.4625 x 100 = -46.25%
Example