108 per 1000 kali 7 per 9 : 1,05

(108/1.000) × (7/9) ÷ 1,05
= (108/1000) × (7/9) ÷ (105/100)
= (108/1000) × (7/9) × (100/105)
= (756/9000) × (100/5)
= (75.600/945.000)
= (756/9.450)
= (2/25)