Dheaven M. answered • 01/10/20
Math and Science Tutor for High School and College Students
The first thing to do is to set up the problem, including numbers and units. In this case, the problem would be set up as 10 inches/4 years. In problems like this with units of linear size and units of time, the unit of time will be the denominator while the unit of linear size would be the numerator. The unit rate in this case would be inches/year.
From there, reduce the fraction until you get to the simplest value. In this case, the simplest value will be the value that represents the growth in inches per year.
In the reduction of the fraction, 10/4 = 5/2 (which you get by dividing both the numerator and denominator by two). Then, divide five by two. The resulting number for inches/year is 2.5 inches/year (in words, inches per year).
2.5 inches/year is the final answer.
