Let's begin by listing out the information given to us:
We have 11 hearts & 20 circles
In ratio, we must pay proper attention to the order of arrangement. For example, "ratio of hearts to circles" is not the same as "ratio of circles to hearts" i.e. 11:20 is not the same as 20:11.
The ratio of circles to hearts = 20:11
This is the simplified form because 20 & 11 do not have any further factor