I do both and business, for me, is brain-numbingly boring. Every lesson since year 9 (I'm in year 11 rn), i've almost fallen asleep. on the plus side, it's ridiculously easy - like, you could do 3/4 of the paper using common sense alone. history is indeed a whole lot harder, but definitely a lot more interesting (again, in my opinion). i'd advise taking whichever you'll think you enjoy more, besides, if you wanna take economics for a-level, you won't need business.
PS: don't worry about computing. i mean, i do OCR, and their tests are fairly straightforward - just needs a bit of memorising! the coding's the fun+easy bit.