Question

240fl oz = c?

Answer 1

`30` cups

Explanation:

There are `8` fluid ounces for every cup, so `240` fluid ounces would equal `240/8` cups:

`8/1=240/c rarr c` represents the unknown number of cups

`(8*30=240)/(1*30=c)`

or

`8c=240`

`c=30`

Answer 2

It just depends on what 'c' is, and the relationship of 'c' to fluid ounces.

Explanation:

Any "conversion" factor is just the ratio of one measure to another. They do need to be in the same dimensions - you cannot 'convert' feet to gallons. So, for the given expression to be valid, 'c' must be SOME unit of volume, because fl.oz. is a measure of liquid volume.
Many conversion tables, lists, and even calculators are available online.

Example:
https://www.isa.org/uploadedFiles/Content/Training_and_Certifications/ISA_Certification/CCST-Conversions-document.pdf

https://www.metric-conversions.org/metric-conversion-table.htm

https://www.convert-me.com/en/