SOLUTION: Could someone please help me to use multiplying by 1 to find an expression equivalent to 7/15 with a denominator of 105c?

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Question 422885: Could someone please help me to use multiplying by 1 to find an expression equivalent to 7/15 with a denominator of 105c?
Answer by rapaljer(4671) About Me  (Show Source):
You can put this solution on YOUR website!
Since you are starting out with the fraction 7/15, and you want to end up with a denominator of 105c, you have to compare the denominators of the two fractions to see what is "Missing" from the first denominator. In other words, what would you multiply 15 by in order to get 105c? The trick is to divide 15 into 105c, and see what you get! It turns out to be 7c.

So, multiply the fraction 7%2F15by 1, which in this case is %287c%29%2F%287c%29, and you get
%287%2F15%29%2A%28%287c%29%2F%287c%29%29, which is %2849c%29%2F%28105c%29.

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Anyway, I have a LOT of pages that may be helpful to you including my complete curriculum and a lot of solutions in COLOR to help you understand. There are also VIDEOS (on a variety of topics!) of me teaching in my classes before I retired. Best of all, it's all FREE!

Dr. R^2

Dr. Robert J. Rapalje
Seminole State College of Florida