How to use 读作 in the sentence "67.5读作六十七点五"? In the textbook, I read this: 67.5读作六十七点五.

Question: 
What's the role of 读作？ Why 读作 is there？

谢谢您！
You can replace 读作 with 'read as'

The sentence can be translated as:
  67.5 reads as 六十七点五