A mechanic's tool set is on sale for $204 after a markdown of 40% off the regular price. Find the regular price.

$340

Step-by-step explanation:

From the information given we know that $204 is the price after a 40% discount is applied which means that this value represents 60% of the regular price and you can find the answer using the rule of three:

204 →  60%

 x    ← 100%

x=(204*100)/60=340

According to this, the answer is that the regular price of the product is $340.

340*0.4= 136

340-136=204