Select those which can be written as a rational number

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)

Solution:

Rational number with denominator 4 in their lowest form are,

64/16 = 16/4, 36/-12 = 12/-4, 5/-4, 140/28 =20/4

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