The directions for mixing an insect spray say to use 2 7/8 ounces of chemical in each gallon of water. How many ounces of chemical should be mixed with 3 2/3 gallons of water? First, estimate the answer to the application problem. Then find the exact answer.
1 gallon needs about 3 ounces of chemical 4 gallons needs about 3 x 4 = 12 ounces of chemical
------
Actual:
1 gallon = 2 7/8 ounces of chemical 3 2/3 gallon = 2 7/8 x 3 2/3 ounces of chemical. [Assuming you can use the calculator to compute] 3 2/3 gallon = 10 13/24 ounces of chemical.