increase by和increase to 有什么区别,要利于解题

increase by增加了 increase by 10%增加了百分之十
increase to 增加到 increase to 100增加到100increase by后面可以加具体数字吗 例如increase by 1500yuan可以，比如voa里说的The university estimates that the cost for next year willincreaseby$400.不过加百分数用的比较多