That would be what you assume if they were two separate operands, but they're not.
It's a single number, the same as 6.5>I said that the decimal system is also a fraction system, because it is made of tenner fractions.
Yeah, that's how our numerical system works. But we're talking about notation.
6.5 = "six and five tenths" = 6 5/10, simplified to 6 1/2
The decimal system is just a roundabout way to illustrate fractions because europlebs are deathly afraid of them and need it to be easier and more accessible.
Same is true for metric in general.