20 out of 70, 15 out of 35, 42 out of 45, 21 out of 36, 33 out of 55, 26 out of 52, 50 out of 20, 28 out of 35, 81 out of 18, the simplest score is urgent! Great Xia, help! Please, thank you

20 out of 70, 15 out of 35, 42 out of 45, 21 out of 36, 33 out of 55, 26 out of 52, 50 out of 20, 28 out of 35, 81 out of 18, the simplest score is urgent! Great Xia, help! Please, thank you

20 out of 70 = 2 out of 7
15 out of 35 = 3 out of 7
42 out of 45 = 14 out of 15
21 out of 36 = 7 out of 12
33 out of 55 = 3 out of 5
26 out of 52 = 1 out of 2
50 out of 120 = 5 out of 12
28 out of 35 = 4 out of 5
81 out of 18 = 9 out of 2