People should feel free to correct my arithmetic because it's often wrong; 90 right? Two-thirds of 90, whoops, what do I need, start again.

我要是算错了要提醒我,我总算错,90对吧,90的2/3,我说错了

耶鲁公开课 - 博弈论课程节选

So even at my level of arithmetic that's a lot less than 30%.

就我的算数水平都知道这绝对少于30%

耶鲁公开课 - 博弈论课程节选