9/4 = 9/0,25х
9 * 0,25х = 4 * 9
2,25х = 36
х = 36 : 2,25
х = 16
2 1/4 : 3 1/3 = 1,4 : 1/3у
2 1/4 * 1/3у = 3 1/3 * 1,4
9/4 * 1/3у = 10/3 * 14/10
3/4у = 14/3
у = 14/3 : 3/4
у = 14/3 * 4/3
у = 56/9
у = 6 2/9
16 : 3s = 28 : 7
3s * 28 = 16 * 7
84s = 112
s = 112 : 84
s = 112/84
s = 4/3 = 1 1/3
1 2/5 : 2 1/3 = 5/3t : 3,5
2 1/3 * 5/3t = 3,5 * 1 2/5
7/3 * 5/3t = 35/10 * 7/5
35/9t = 49/10
t = 49/10 : 35/9
t = 49/10 * 9/35
t = 7/10 * 9/5
t = 63/50 = 1 13/50