Aurora219 said:
Here in the UK we use a horrible mix of the two. But actually, if you think about it, imperial measurements make a whole lot more sense. For example: A metric measurement of 10 can be divided by 1, 2, 5 and 10. An imperial measurement of 12 can be divided by 1, 2, 3, 4, 6, and 12. This makes it a lot more flexible for marketing, measuring and the like.
And kinda why it was invented in the first place..
But division is useless when all division nowadays is done electronically with use of decimal points. People no longer take weights of goods and divide them around, they measure out precise amounts and the good thing about a decimal scale is that it is continuous.
Moving from 1-3/8 to 1-1/4 1-5/8 is just awkward and increases the probability of error or confusion.
Another benefit is 1.7 kilograms is instantly recognisable as 1 kilogram and 700 grams.
I mean it would be fine if by standard they stuck with all pound measurements going 1-1/16 to 1-2/16 to 1-3/16 and so on only they don't, you have to remember which kind of multiplication to figure out how many more ounces there are on top of the pound when you are given weight like that.
Adding them together is a nightmare
How do you easily add 2-3/4 and 5-1/16?!??!
Adding even complex quantities like 4.78 and 7.69 together is easy:
4.78
7.69
=12.47
And that is literally all the working you need.
And pounds-ounces only let you divide by 4 useful numbers 2, 4, 8 and 16 compared to 2, 5 and 10. That's only one extra "easy division" but the divide-by-10 is SO incredibly useful because our counting system is base 10, it just simplifies things so much as all you have to do is move the decimal place. Easy.
Often if I have a problem in imperial I will convert it to metric, do the working, then convert back to imperial.