Question

How do you change 2/5 into a decimal?

Answer 1

`0,4`

Explanation:

The key is to get the denominator as some multiple of 10, since then we can convert easily to decimal by just moving the decimal comma the appropriate number of places.

In this case, easiest would be to convert it by multiplying top and bottom by 2.
(Since we do the same to top and bottom, the value stays the same).

`therefore 2/5=(2xx2)/(5xx2)=4/10=0,4`