Two quantities can be compared by a ratio. As a fraction in the simplest form, a typical manner of expressing a ratio. If you compare the two numbers with distinct measuring units, this type of ratio is known as a rate. A rate is unit rate when it is 1. A rate is unit rate.
You can use a ratio to compare things for example you can compare the number of people in class, there are 6 boys and 8 girls so you will compare them like this : 6:8.
There are various ways to do this : 6/8 as a fraction, 6:8 or in words 6 to 8. You have to make sure to write it in the correct order or you will for sure not get the point.
