15 US gallons = 1,920 ounces.
15 US gallons = 1,920 US fluid ounces.
if 12 ounces treats 15 gallons, 15 divided by 5 is 3, so just divide 12 by 3, and 4 is your answer.
For 1 quart per 100 gallons, in 15 gallons you would need 0.15 quarts. Since there are 32 ounces in a quart, you would need 4.8 ounces for 15 gallons.
2.5 oz
4/15 = 0.266666....... Divide 15 into 4 to find how many ounces for one gallon.
20 gallons = 2,560 ounces.
13.2 gallons is 1,689.6 ounces.
8320 ounces is 65 gallons.
15 oz is equivalent to 0.117 gallons.
169 ounces is 1.32 US gallons.
304 ounces is equal to 2.375 gallons.