It's 77% UMS. If you did the same in each exam theoretically you'd have 77% UMS in each obviously. I just checked and the ones you did have very similar grade boundaries and a maximum of 100 UMS. So, 77 UMS for each one. It's around 4 and a half marks greater than the raw mark equivalent of 34 for 70% UMS so yeah, about 38-39 average. Can't tell how much for each one unless you have the printout with the exam UMS marks on.