original price: $20
discount: 40%
[tex]20\cdot0.4=8[/tex]
Discount is $8
Final price:
[tex]20-8=12[/tex]
The final price is $12
The percentage you are actually paying is 100% - 40% = 60%
The equation that describes this problem is:
[tex]\begin{gathered} A=P\cdot\frac{(100-d)}{100} \\ A=20\cdot\frac{100-40}{100}=12 \end{gathered}[/tex]
Where A is the actual price, P is the original price and d is the discount.
