here are 7 pencils and 9 pens in Jack's pencil case. Represent the number of pens to the number of pencils as a ratio.
9:7
To represent the number of pens to the number of pencils as a ratio, you need to compare the two quantities. In this case, there are 7 pencils and 9 pens in Jack's pencil case.
The ratio of pens to pencils can be expressed as:
9 pens : 7 pencils
This ratio indicates that for every 9 pens, Jack has 7 pencils.