order the fractions from least to greatest 3/8 2/7 4/9
LCM(7,8,9) = 7*8*9
so, we have
3/8 = 3*7*9/7*8*9 = 189/504
2/7 = 2*8*9/7*8*9 = 144/504
4/9 = 4*7*8/7*8*9 = 224/504
Now you should have no problem
so, we have
3/8 = 3*7*9/7*8*9 = 189/504
2/7 = 2*8*9/7*8*9 = 144/504
4/9 = 4*7*8/7*8*9 = 224/504
Now you should have no problem