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usually
Percentages (= numbers of per cent) are written in words as twenty-five per cent and in figures as25% .百分比用文字表示为 twenty-five per cent，用数字表示为 25%。 If a percentage is used with an uncountable or a singular noun the verb is generally singular. 百分比与不可数名词或单数名词连用时，动词一般为单数 ：◆ 90% of the land is cultivated.* 90% 的土地为可耕地。 If the noun is singular but represents a group of people, the verb is singular in NAmE BrE 如果是单数集合名词，美式英语动词用单数，英式英语用单、复数均可 ：◆ Eighty per cent of the work force is/are against the strike.百分之八十的劳动力都反对这次罢工。 If the noun is plural, the verb is plural. 如果名词为复数，动词用复数 ：◆ 65% of children play computer games.* 65% 的孩子玩电脑游戏。