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Sagot :

60/50 = (6*10) / (5*10) = 6/5

21/27 = (3*7) / (3*9) = 7/9

90 / 135 = (9*10) / (9*15) = 10/15 = (2*5) / (3*5) = 2/3

78/45 = (3*26) / (3*15) = 26/15

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