Question

I’m wondering why my teacher marked me wrong on these two problems. Was there something in my work that was wrong?

(Just check 1 and 2)

Answer 1

On #1, you used the side of 18 twice.

You should have had

`(40.5)/(18)=(49.5)/(22)=\frac{54}{\boldsymbol{24}}`

with 24 in that last denominator. And with 24 in the last denominator, they're all equal to 2.25.

On #2, you should have compared 90 to 40 and then 81 to 36:

`(90)/(40)=(81)/(36)`

Those are both equivalent to 9/4.