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The least common denominator will be the least common multiple between 8 and 10, which is 40. So convert the fractions to a denominator of 40.

  • 40 = 8 x 5, so for 5/8, multiply top and bottom by 5 -> 25/40
  • 40 = 10 x 4, so for 7/10, multiply both by 4 -> 28/40.

So now you have 5/8 = 25/40 and 7/10 = 28/40. You can add them and get 53/40, or 1 13/40. You can compare them and find that 25 < 28, so 5/8 < 7/10.

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11y ago
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6y ago

5/8 = 25/40

7/10 = 28/40

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Q: How do you rewrite 5 over 8 and 7 over 10 with the least common denominator?
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