Hasil dari 5 3/4 – (1 2/5 + 2 1/2)=

5 3/4 – ( 1 2/5 + 2 1/2)

= 23/4 – ( 7/5 + 5/2)

= 115 – (28+50)/20

= (115 – 78)/20

= 37/20

= 1 17/20