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= 21/4 : 3/2
= 21/4 : 6/4 (samakan penyebutnya)
= 21 : 6
=7 : 2
b. 75 cm : 2,5 cm
= 750 : 25
= 30 : 1
c. 150 gr : 3 kg
=150 : 3000
=1 : 20 (gr)
d. 250 ml : 5 l
= 250 : 5000
= 1 : 20 ( ml)
b). 75:2,5 = 30:1
c). 150:3000=1:20
d) 250 : 5000=1:20