1. …had the largest percentage/proportion of…
2. …account(s) for/take(s) up 10%…
3. Compared with A, B has a higher percentage.
4. On the top of the list of…, which accounts for 60%.
5. At the bottom is…,which takes up 20%.
6. A is second to B.
7. A is ranked/rated first, followed by B at 30% and C at 25%.