3/8=0,38 8/15=0.53 16/73=0.22 8/21=0,38
1,428:42=34
2,924:68=43
30,296:56=541
136,576:64=2,134
254,415:35=7,269
710,278:91=7,805.2527472527
3/12+ 25/30= 5x3/5x12 + 2x25/2x30= 15/60 +50/60= 15 + 50/60 = 65/60 = 13x5/12x5= 13/12 = 1 1/12
2)10/24 - 21/54= 9x10/9x24 + 4x21/4x54 = 90/216 + 84/216 = 90 + 84/216 = 174/216= 29x6/36x6= 29/36
/ --- это дробь