0.8: 1.2=2/3

0.75: 18= 1/24

38:225=38/225

12.5: 10= 1.25

1. A brine, the ratio of salt to water is 2: 15. This kind of water has 340 kilograms, of which how many kilograms are salt and water respectively?

Solution: Salt: 340×2/ 17=40 (kg) water: 340-40=300 (kg), so there are 40 kg of salt and 300 kg of water.

2. Qiqi reads books. On the first day, he read 45% of the total pages, and on the second day, he read 30% of the total pages. On the first day, he read 45 more pages than the next day. How many pages are there in this book?

Solution: 45÷(45%-30%)=300 pages, so this book has 300 pages.

65438+24/20 = 65438/5+0

48: 144= 1:3

3 27 in 7: 35 = 5: 9.

7.2:0.09=80: 1