Сократи дроби

\(\dfrac{160}{480}=\dfrac{10\cdot 16}{10\cdot 48}=\dfrac{16\cdot 1}{16\cdot 3}=\dfrac{1}{3}\) .

1. \(\dfrac{1155}{1485}=\) [ ] \(=\) [ ] \(=\) [ ] \(=\) [ ];
2. \(\dfrac{192}{256}=\) [ ] \(=\) [ ] \(=\) [ ];
3. \(\dfrac{252}{308}=\) [ ] \(=\) [ ] \(=\) [ ].