A man must mix some liquid fertilizer for his lawn. The instructions say to use 2 cups of chemical for every 1/2 gallon of water. How many cups of chemical will be needed for 13 gallons of water?
He must mix 52 cups of liquid fertilizer with the 13 gallons of water.
He needs 2 cups of fertilizer for every 1/2 gallon of water. It means that he must mix the fertilizer enough for
Then, the amount of fertilizer must be 26 times bigger: