1 1per2 +2,25-25% plisss guys

[tex]1.5 + 2.25 - 0.25 \\ 3.5 \\ [/tex]
atau
[tex]3 \frac{1}{2} [/tex]

1 ½ + 2,25 - 25%
= 1 ½ + 225/100 - 25/100
= 150/100 + 225/100 - 25/100
= 350/100
= 3 50/100
= 3 ½