12per15 di bagi 4per3 di tambah 1per2

12/15 ÷ 4/3 + 1/2
( 12/15 × 3/4 ) + 1/2
3/5 + 1/2
6/10 + 5/10 = 11/10 = 1 1/10 = 1,1

= 12/15 : 4/3 + 1/2
= 12/60 : 4/60 + 1/60
= 3/60 + 1/60
= 4/60 = 0.06