50%-1/4+2 1/2= pakai cara yaa

50/100 - 1/4 + 2 1/2
= 50/100 - 1 × 25 / 4 × 25 + 5/2
= 50/100 - 25/100 + 5 × 50 / 2 × 50
= 50/100 - 25/100 + 250/100
= 275/100
= 2 75/100

1/2-1/4+5/2 = 2-1+10/4
                   = 11/4

semoga membantu....