Answer:
Highest = Justin
Least = Sam
Step-by-step explanation:
Given
Represent Justin with J, Sam with S and Andra with A.
From the question, we understand that
J = 2¼ of S
A = ½ of J
Required
Determine who mowed the most and who mowed the least.
J = 2¼ of S
J = 2¼ * S
J = 2¼S
Also,
A = ½ of J
A = ½ * J
Substitute 2¼S for J
A = ½ * 2¼S
Convert to improper number
A = ½ * 9/4S
A = 9/8S
Convert to mixed number
A = 1⅛S
The above expression implies that Andra mowed 1⅛ lawns as Sam had.
To get a clearer picture of the question.
Assume that:
S = 16
i.e Sam mowed 16 lawns
Substitute 16 for S in A = 1⅛S
A = 1⅛ * 16
A = 9/8 * 16
A = 9 * 2
A = 18
Also, substitute 16 for S in J = 2¼S
J = 2¼ * 16
J = 9/4 * 16
A = 9 * 4
A = 36
By comparison
36 > 18 > 16
Or
J > A > S
This implies that;
Justin mowed highest and Sam mowed the least
