What is 33 photos into two grours so the ratio is 4 to 7

You have 33 photos

You need to separate the photos in two groups for a ratio of 4:7

So what you do is add both numbers of the ratio

 

Then divide the 33 photos by 11

÷

So that means that each number in the ratio is equivalent to 3 photos

Now multiply each ratio by 3

and

So the ratio of the photos are 12 to 21 or 12:21

ratio is 12 to 21 or can be written as 12:21

Idk what the answer is bc i don't get it