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What number is 2/3 less than -5/8?

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John McCann answered

You need a common denominator to add/subtract fractions and a form of one to convert them. 24 is common here.

8*2/8*3 = 16/24

- 3*5/3*8 = - 15/24

- 15/24 - 16/24

same as

- 15/24 (+) - 16/24

= - 31/24

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