Sorry but my question was wrong. I misspelled a word. So am resubmitting my question
How do I find the ratio of the first number to the second and simplify?
0.4 to 1.2
You do the first number(.4) divided by the second number(1.2) which is 1/3. Because of that you just have to put 1 on the left and 3 on the right and just stick a colon in between to get 1:3.