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( 81/4 - 75/10 ) : 3/1
( 405/20 - 150/20 ) x 1/3
225/20 x 1/3
51/4 x 1/3
51/12
4 3/12
4 1/4 (A)
81/4 - 75/10
kpk= 405/20 - 150/20
=255/20
diperkecil 51/4
51/4 : 3/1
= 51/4 x 1/3 = 51/12
51/12 di perkecil
17/4 = 4 1/4 kg
atau 4.25 kg
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