We are given the dimensions of a parallelogram and are asked to estimate its area
Recall that the area of a parallelogram of base b and height h is given by the formula

So the area of the parallelogram would be

as 3 1/4 and 5 1/2 are mixed numbers, we need to transform them to fractions
Recall that given a mixed number of the form

we can transform it into a fraction by multiplying the whole number by the denominator and adding the result to the numerator while leaving the denominator fixed. In this case, that is

So, applying this formula to both numbers, we get

and

so the area of the parallelogram would be

so the area of the parallelogram is approximately 18 square yards