Question

Select those which can be written as a rational number with denominator 4 in their lowest form:
7/8, 64/16, 36/-12, -16/17, 5/-4, 140/28

Answer 1

7/8=7/8 (as 7 and 8 do not have any common factor)
64/16=16/4 (as 64 and 16 have common factor i.e. 4 and can be divided by it to get the denominator as 4)
36/-12=12/-4=-12/4 (as 36 and 12 have common factor i.e. 3 and can be divided by it to get the denominator as 4)(the minus sign can be given to the numerator from the denominator, if required)
-16/17=-16/17 (as -16 and 17 do not have any common factor)
5/-4=5/-4=-5/4 (the minus sign can be given to the numerator from the denominator, if required)
140/28=20/4 (as 140 and 28 have common factor i.e. 7 and can be divided by it to get the denominator as 4)

Answer 2

Answer:

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