I was watching a video on Triangle Similarity when a ratio came up - CF/AB = y minus x over y. The person in the video then continued to write CF/AB = 1 minus x over y. Can someone please show me the steps on how to derive that?

y-x/y ---> 1-x/y

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- Jun 12th 2017, 03:38 PM #1

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## How does y-x/y become 1-x/y?

I was watching a video on Triangle Similarity when a ratio came up - CF/AB = y minus x over y. The person in the video then continued to write CF/AB = 1 minus x over y. Can someone please show me the steps on how to derive that?

y-x/y ---> 1-x/y

- Jun 12th 2017, 03:47 PM #2