Can u pls show me the work on how to do this?

I believe you do it this way.

You multiply the den. with the whole number and add the num.

2 x 8 + 1 = 17. This now becomes 17/8 because you keep the same den.

1 x 7 + 2 = 9. This now becomes 9/7.

Now subtract 17/8 - 9/7

This equals 8/1, or, 8.

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