2 1/2 - 10% = jln kerjax

5/2 - 10/100
5/2 - 1/10

samakan penybut

(25-1)/10

24/10

2 1/2 - 10%
= 2 1/2 - 10/100
= 2 50/100 - 10/100
= 2 40/100
= 2 2/5