Need help, thanks!!

They are simply showing some examples ,but I don't understand why 12.7 is changed to 12.5 in (Step1): (12.5*3.40)+0.75=43.18+0.75=43.93

Jon filled up his car with 12.7 gal of gasoline. He paid $3.40 per gallon of gasoline, plus a 0.75 debit card fee. What percent of total price paid was the debit card fee?

Step 1: Find the total cost

(number of gallons * price per gallon) + debit card fee

(12.5*3.40)+0.75=43.18+0.75=43.93

Question

Need help, thanks!!



 They are simply showing some examples ,but I don't understand why 12.7 is changed to 12.5 in (Step1): (12.5*3.40)+0.75=43.18+0.75=43.93

Jon filled up his car with 12.7 gal of gasoline. He paid $3.40 per gallon of gasoline, plus a 0.75 debit card fee. What percent of total price paid was the debit card fee? 

Step 1: Find the total cost

(number of gallons * price per gallon) + debit card fee 

(12.5*3.40)+0.75=43.18+0.75=43.93

jdoe0001 · Answer

well, the total cost is what he paid for the gallons PLUS the debit card fee

jdoe0001 · Answer

but you already got it, :)

anonymous · Answer

But if I subtract 12.5 from 0.75 it comes out as 11.75

jdoe0001 · Answer

ok... so... why would you want to do that? )

jdoe0001 · Answer

tis 12.7 btw, you hmm used 12.5 but I assume it's just a typo, since 43.93 is correct

anonymous · Answer

It's an example though,(I didn't do this) I don't understand why 12.7 is changed into 12.5

anonymous · Answer

Did they do a typo or something? I'm confused

jdoe0001 · Answer

a typo I'd think :)

anonymous · Answer

Okay, thanks Jdoe!

jdoe0001 · Answer

because it shouldn't
12.7 gallons at $3.4 is          12.7*3.4
plus 75cents of debit charge
12.7*3.4 + 0.75 = 43.93