hasil dari 3 1/2 -1 3/4:2 1/2=...... pakai caranya

=> 3 1/2 - 1 3/4 : 2 1/2
=> 7/2 - 7/4 : 5/2
=> 7/2 - 7/4 * 2/5
=> 7/2 - 14/20
=> 70/20 - 14/20
=> 56/20
=> 28/10
=> 14/5
=> 2 4/5

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