2.143. а) \(\frac{36}{84}\); б) \(\frac{120}{136}\); в) \(\frac{48}{92}\); г) \(\frac{130}{143}\).
2.144. а) \(0{,}6\); б) \(0{,}28\); в) \(0{,}75\); г) \(0{,}54\); д) \(0{,}65\); е) \(0{,}625\).
2.145.
а) \(\frac{90}{650},\ \frac{273}{650},\ \frac{11}{650}\);
б) \(\frac{12320}{24255},\ \frac{1155}{24255},\ \frac{18081}{24255}\);
в) \(\frac{44}{60},\ \frac{35}{60},\ \frac{37}{60}\);
г) \(\frac{710}{1080},\ \frac{345}{1080},\ \frac{564}{1080}\).