Atool that regulary sells for $18.50 is on for 20 % off what is the sale price?

So 
20% of 18.50 =  

to get this you multiply 
20% is .20 in decimal form 

18.50 x .20 = $3.70 

so 20% is $3.70, which means the discount is $3.70 

so then you subtract $3.70 from the original price of 18.50 and you get 

$14.80 which is your answer (:

The answer is c because you turn 17.5% into a decimal which gives you .175 then you times that by $361.35 which gives you 63.23625 but then you round that which gives you 63.24. then you at 63.24 pulse 361.35 and you round it which gives you $425