If you can't make basic calculations with ratio and percentages, it seems unlikely that you can compare different costs per unit weight/volume or do the maths t

If you can't make basic calculations with ratio and percentages, it seems unlikely that you can compare different costs per unit weight/volume or do the maths to figure out how much food you need without waste. Yes, you can look at a chicken and say "that's enough for 3 people". Yes - in the UK - it's quite likely (legally required?) that all products are labelled per 100g or per kg (although I'd contest people failing these tests are likely not to be understand or care for that labelling). It's a tough argument to make that these skills have no impact on on budgeting at all.