Answer:
1 : 3
Explanation:
0.4 x 3 is equivalent to 1.2
so 0.4 is 1 as 1.2 is 3
1:3
it is a bit easy to get it out of decimal ratio, so multiply it by 10, which gives you 4:12, so now you have a bigger answer to work with, you can divide 12 by 4, which gives you 3, and a ratio of 1:3
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