说的是关于 single-family home selling 的问题,好象以前见过,但我做了好几分钟,愣没对上答案,影响了我的 pace 。
The last year, 60% of existing single-family homes were sold, and 76% of new single-family homes were sold. All the single-family homes were three times as many as the new single-family homes. What percent of total single-family homes were sold last year?