Instead of reading paper books, more people like to use electronic devices (设备) to read in China now. A survey was made among 800 students. According to the chart below, the students who read on electronic devices are _______ more than those who read with traditional paper books.
Ways | Mobile phones | iPad | Paper books |
Number | 40% | 1/4 | ? |
- A、320
- B、240
- C、40