Решите уравнение: 2 1/4: 3 1/3=1,4: (1/3у); 16: (3s)=28: 7

1) 2 1/4:3 1/3=1,4:1/3у
9/4:10/3=14/10:1/3у
9/4×3/10=14/10×3/1у
27/40=42/10у
у=27/40:42/10=27/40:21/5
у=27/40×5/21=135/840=27/168=9/56=1/7
2) 16:3s=28:7
16:3s=4
16/3s=4
s=4: 16/3
s=4/1×3/16
s=12/16=3/4