百分數用英語怎麼表達?

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細胞百分數爲2.76±0.45；

Determination of mole percent of g+ c in DNA of Bacillus thuringiensis seven subspecies.蘇雲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。