How much will gas cost if you have to drive one hundred and eighteen miles and gas costs 3.15 dollars on a gas tank that holds 18 gallons per mile?
it will cost you about $368.55 dollars to go 118 miles
Okay. The 'full amount' of something is one-hundred percent. Half of one hundred is fifty. For example, if something costs five-hundred dollars and it was on special in a shop, it would cost two hundred and fifty dollars. So if an advertisement says something is fifty percent off, it means half off the original price.
So 60 miles to the gallon, and we want to drive 1180 miles total. Divide the total number of miles by how many miles per gallon we get, that'll give us the total number of gallons needed. So 1180/60 = 19.666667 gallons. If gas costs 4.20 dollars per gallon, and we need 19.666667 gallons or approximately 20 gallons, we need 20*4.20 dollars, which is 84 dollars.