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Perform the following conversion: (c) $1.89/gal to dollars per liter

Okay guys, so in this question we have 189 dollars per gallon and we want to convert that to dollars per litre. So the dollar sign stays the same and we're trying to convert gallons to litres. So we have 189 per gallon. So we have to go from gallon to litres. You could convert gallons to quarts, then we could convert from quarts to litres. So that's one way to do it.

So we know that for every gallon we have 4 quarts and we want to put gallons on the top here because we want to be able to cancel it out and then we know that for every 1 litre we have 1.057 quarts and once again we put quarts on the top because we want to be able to cancel it out. So now our units are going to be dollar per litre which is exactly what we're looking for. So when you multiply everything on the top and divide by everything on the bottom, you guys should get 0.499 dollars per litres. Alright guys, see you soon.