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Subtraction works the same way

7/8 - 1/4

Same? No — eighths and quarters. But 8 is a multiple of 4. ✔ Related!
Rename. 1/4 = 2/8
Count. 7/8 - 2/8 = 5/8

We renamed the quarter. We never touched the eighths.

Your turn on whiteboards: 9/10 - 2/5 (don't forget simplest form!)

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