`4/9 + 2/5 - 28/45`
`= 20/45 + 18/45 - 28/45`
`= (20+18-28)/(45)`
`= 10/45`
`= 2/9`
................................................
`24/75 \div 8/15 * 10/9`
`= 24/75 * 15/8 * 10/9`
`= 8/25 * 15/8 * 10/9`
`= 120/200 * 10/9`
`= 3/5 * 10/9`
`= 30/45`
`= 2/3`
................................................
`54/10 = 5,4`
`3/100 = 0,03`
`21/100 = 0,21`
`2312/1000 = 2,312`
.................................................
`5 26/100 = 526/100 = 5,26`
`3 5/100 = 305/100 = 3,05`
`12 7/10 = 127/10 = 12,7`
`45 3/100 = 4503/100 = 45,03`
`2 23/1000 = 2023/1000 = 2,023`
