(3 3/5 - 2 1/15) * 5= 7 2/3
1) 3 3/5 - 2 1/15 = 18/5 - 31/15 = (18*3 - 31*1)/15 = (54 - 31)/15 = 23/15 = 1 8/15
2) 1 8/15 * 5 = 23/15 * 5 = 23/3 = 7 2/3
(1 14/17-1 1/34)*34= 27
1)1 14/17 - 1 1/34 = 31/17 - 35/34 =(31*2 - 35*1)/34 = (62 - 35)/34 = 27/34
2)27/34 * 34 = 27
8 3/17 * 5 1/4 + 3 14/17 * 5 = 62 3/68
8 3/17 * 5 1/4 + 3 14/17 * 5 = 139/17 * 21/4 + 65/17 * 5 = 2919/68 + 65/17 * 5 = 2919/68 + 325/17 = (2919*1 + 325*4)/68 = (2919 + 1300)/68 = 4219/68 = 62 3/68