A ratio is a comparison of two quantities by division.
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Practice makes perfect
There are many different ways to compare amounts or quantities. A ratio is a comparison of two quantities by division. For example, the ratio of a to b can be written in two different ways.
a/b or a: bWe want to find the ratio of adults to students on the seventh-grade field trip as a fraction in simplest form. According to the given table, there are 24 adults and 180 students on the trip. Let's use this information to write the fraction that represents the desired ratio. We will write the number of adults in the numerator and the number of students in the denominator.
l adults → students →
24/180
Finally, since the greatest common factor (GCF) of 24 and 180 is 12, we can reduce the fraction by dividing both the numerator and denominator by 12.
