8 per 9 : 18 per 30 sama dengan?

8/1/2 :30 
= 

16:30
= 

8/15

[tex] \frac{8}{9} \div \frac{18}{30} \\ = \frac{8}{9} \times \frac{30}{18} \\ = \frac{8}{9} \times \frac{5}{3} \\ = \frac{40}{27} \\ = 1 \frac{13}{27} [/tex]