1) 4 : 2 2/5 = 4 / (2 + 2/5) = 4 / (10/5 + 2/5) = 4 / 12/5 = 4 5/12 = 20/12 = 5/32) 6 : 1 5/7 = 6 / (1 + 5/7) = 6 / (7/7 + 5/7) = 6 / 12/7 = 6 7/12 = 42/12 = 7/23) 26 : 1 4/9 = 26 / (1 + 4/9) = 26 / (9/9 + 4/9) = 26 / 13/9 = 26 * 9/13 = 234/13 = 18.
1) 4 : 2 2/5 = 4 / (2 + 2/5) = 4 / (10/5 + 2/5) = 4 / 12/5 = 4 5/12 = 20/12 = 5/3
2) 6 : 1 5/7 = 6 / (1 + 5/7) = 6 / (7/7 + 5/7) = 6 / 12/7 = 6 7/12 = 42/12 = 7/2
3) 26 : 1 4/9 = 26 / (1 + 4/9) = 26 / (9/9 + 4/9) = 26 / 13/9 = 26 * 9/13 = 234/13 = 18.