百分數用英語怎么表達?

　　例句：

　　There was no significant difference among the 4 group in average age.

　　各組平均年齡、工作強度、標準體重百分數均無顯著性差異（P＜0.05）。

　　The percentage of G cells was 2.76 ± 0.45;

　　G細胞百分數為2.76±0.45；

　　Determination of mole percent of g+ c in DNA of Bacillus thuringiensis seven subspecies.蘇云金芽孢桿菌七個亞種酌DNA的G+C克分子百分數的測定。

　　Then, the synthesis conditions, such as KOH excess%, calcination temperature, etc. were optimized.優化了合成過程中的工藝條件，包括K過量百分數、焙燒溫度等。