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2. Nilai pecahan = 4/7
misalkan faktor pengali = x ----> 4x/7x
Selisih pembilang dan penyebut = 15
jadi 7x - 4x = 15
3x = 15
x = 15/3 = 5
jadi pecahan tersebut: 4x/7x = 4.5 / 7.5 = 20/35