good grades but low PUMs for Cambridge

Hi. I'm applying to Cambridge for biological natural sciences as an international student. I'm currently filling out my Cambridge application, and they're asking for my percentage uniform marks. So I'm predicted A*A*A*AA in biology, chemistry, psychology, math and english respectively, and I got AAABA in my AS levels. I'm also retaking math to hopefully bring up my score a bit. The only problem is that my percentage uniform marks are quite low (like 88 is my highest, and chemistry I only have 80.) Will that impact my chances of getting in? Thank you!