"Fluid ounce" is one of many units used to describe capacity.
Some others are the liter, the gallon, the cubic meter, and the pint.
"Fluid ounce" is related to capacity in the same way that
"inch" is related to length or distance.
All it’s asking is how many students basically scored 90 and under. there’s a total of 25 kids and 14 scored a 90 or less.