Two places outside of school where people would use fraction would be when they are dividing a pizza and at shops figuring out how much money your don’t have to pay when the shop has discount.
People use decimals when measuring things at a super market and when paying the electricity bill.
Shops, Supermarkets and Malls.
So that its easier than adding 3/5 and 6/10 you can just think quicker.
I would convert them to decimals then compare the decimals from smallest to greatest then look at the fractions and order them from the decimals I see.