9 fl oz is 1.1 cup of water.
200 16 fl oz-glasses is 25 gallons.
4.225 oz
768 fluid ounces @128 fl oz per US gallon.
No. 8 ax 12 fl oz = 96 fl oz. Either side of the pond, a gallon is > 100 fl oz (UK: 160 fl oz; US: 128 fl oz) and 96 fl oz < 100 fl oz.
If your glasses are 8oz then 1 PT, 7.7 FL OZ is almost 3 glasses of water. 1 PT is 16oz (or 2 glasses of water) and 7.7 is very close to a full 8oz glass.
A glass is not a standard size.
4
That is 5 fl oz.
That is 9.805 fl oz.
12.8 10-oz servings in 1 US gallon.
That is approximately 2.963, 8 oz glasses.