What is the difference?

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Remember that to subtract fractions we need to find the common denominator first.

To find it, the first thing we need to do is factor the denominator of the second term:

Since is a common factor in both denominators, the common denominator of both fractions is

Now, we can express both fraction with the common denominator and simplify:

We can conclude that the correct answer is the first choice.

$4034.40

the perimeter of the field is the sum of the lengths of the four sides:

47 yd + 158 yd + 47 yd + 158 yd = 410 yd

the cost of 3 ft (1 yd) of fence is 3×$3.28 = $9.84.

so the cost of jake's wood perimeter fance is

(410 yd) × ($9.84 /yd) = $4034.40