Hi there.
We want to find out how many times we are going to multiple 15 to get 1,575. When we know this, we can just multiple the product by 1 to get the number of teachers.
1,575 ÷ 15 = 105
Cool. So now we know that 15 goes into 1,575 that amount of times.
Let's multiply by 1.
105 · 1 = 105
The ratio of students to teachers is 1,575:105
We can check our work by dividing both numbers by the GCF.
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