What is 3.56 in its simplest form

If you want to convert 3.56 into a fraction, you can do it like this:
3 equals to 3/1 and 0.56 equals to 56/100 which simplifies to 14/25.
The result is 3 14/25.

If you want to make it a pure fraction, you have to make one additional step:
because you want to add 3/1 and 14/25, you have to get the same denominators, so 3/1 changes to 75/25. 
Now, you can add 75/25 and 14/25. The result is 89/25.