(2/7 + 1/2 + 3/4) : 1 1/7 = 1 21/32
1) 2/7 + 1/2 + 3/4 = 8/28 + 14/28 + 21/28 = 53/28 = 1 25/28,
2) 1 25/28 : 1 1/7 = 53/28 : 8/7 = 53/28 * 7/8 = 53/32 = 1 21/32
(2/7 + 1/2 + 3/4) : 1 1/7 = 1 21/32
1) 2/7 + 1/2 + 3/4 = 8/28 + 14/28 + 21/28 = 53/28 = 1 25/28,
2) 1 25/28 : 1 1/7 = 53/28 : 8/7 = 53/28 * 7/8 = 53/32 = 1 21/32