Supplier X offers a mechanic a part at 35% off the retail price of $65.60. Supplier Y offers him the same part at 20% over the wholesale cost of $38.80. Which is the better deal, and by how much?

Answer:
Supplier X offers a better deal by $3.92
Explanation:
Here, we want to get the better deal, and at what cost
For supplier x:
The price offered is 35% off the retail price. This means he would be paying 65% of the retail price
We have the price calculated as:
[tex]\frac{65}{100}\times65.6\text{ = \$42.64}[/tex]For supplier Y:
We have 20% over the wholesale cost (that means 120% of the wholesale cost)
We have the price calculated as:
[tex]\frac{120}{100}\times\text{ 38.80 = \$46.56}[/tex]From what we can see, the price of supplier X is better
It is better by how much?
This is calculated as the difference between the two
We have that as:
[tex]46.56\text{ - 42.64 = \$3.92}[/tex]