As the original price is $20 and the markup rate is 18% calculate the 18% of 20 and add it to the original price to find the new price:
Find the 18% of 20:
[tex]20\cdot\frac{18}{100}=3.60[/tex]Add it to the original price:
[tex]20+3.60=23.60[/tex]Then, the new price is $23.60