a)
2*3/7 = 6/7
2 3/7 = (2*7+3)/7 = 17/7
b)
4*1/8 = 4/8 = 1/2
4 1/8 = (8*4+1)/8 = 33/8
c)
3*2/9 = 6/9 = 2/3
3 2/9 = (9*3+2)/9 = 29/9
d)
5*1/4 = 5/4
5 1/4 = (5*4+1)/4 = 21/4
e)
7*1/4 = 7/4
7 1/4 = (4*7+1)/4 = 29/4
f)
12*5/6 = 60/6 = 10
12 5/6 = (12*6+5)/6 = 77/6
