占很大的比例英语

在.中占有很大比重account for a great proportion in ....

按你说的格式，what percentage _______take(s) up .........what percentage________account(s) for ..........what percentage________occupies/occupy.....what percentage________hold(s).....what percentage________make(s) up......都可以的，这些也是描述图表常用的。

percentage就可以吧The percentage of these two factors still need futher study.