Exercise 1 Page 48

We are told that out of 48 trails in a mountain biking park, 37.5 % are beginner trails. First, we will use a percent proportion to find the number of beginner trails. Part/Whole=Percent/100We are going to substitute 48 into the proportion, which is the whole number of trails, and 37.5, which is the percentage of the beginner trails. Then we can solve for the number of beginner trails.

Part/Whole=Percent/100

SubstituteII

Whole= 48, Percent= 37.5

Part/48=37.5/100

MultEqn

LHS * 48=RHS* 48

Part=37.5/100* 48

MoveRightFacToNum

a/c* b = a* b/c

Part=1800/100

CalcQuot

Calculate quotient

Part= 18

We found that there are 18 beginner trails in this park. We know that remaining 48- 18= 30 trails are divided evenly between the intermediate and experts. Intermediate Trails: & 302=15 Expert Trails:& 302=15 We found that there are 18 beginner trails, 15 intermediate trails, and 15 expert trails. This corresponds to answer B.