Ninety percent是单数吗

Ninety percent是百分之90的意思，所以不一定是单数，例如

Ninety percent of 100 is 90, it is even number, but Ninety percent of Ninety equal to eighty one, that is odd number. 100的百分之九十是90，是偶数，而九十的百分之九十等于八十一，就是奇数。