Verified answer

а) 7/12 · 5/8 = 35/96                           б) 6/7 · 8/9 = (2·8)/(7·3) = 16/21

в) 4/9 · 27/16 = (1·3)/(1·4) = 3/4            г) 14/15 · 5/42 = (1·1)/(3·3) = 1/9

д) 13/15 · 45/26 = (1·3)/(1·2) = 3/2        е) 15/28 · 7/30 = (1·1)/(4·2) = 1/8

ж) 35/51 · 17/15 = (7·1)/(3·3) = 7/9        з) 17/26 ·13/18 = (17·1)/(2·18) = 17/36

и) 15/16 · 5/9 = (5·5)/(16·3) = 25/48     к) 4/7 · 5/6 = (2·5)/(7·3) = 10/21

л) 11/15 · 3/5 = (11·1)/(5·5) = 11/25         м) 14/17 · 34/63 = (2·2)/(1·9) = 4/9

н) 12/25 · 9/16 = (3·9)/(25·4) = 27/100