To compare them, put them over common denominators.
4/9 = 32/72
3/8 = 27/72
32 > 27 so 4/9 > 3/8
4 over 9 because if you divide 4 by nine it is .444 and 3 by 8 is .375.
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4/5 = .8 2/3 = .667 4/5 is greater than 2/3.
No, 11/22 or 1/2 is greater than 3/8.
3/8 - 3/4 = 3/8 - 6/8 = (-3/8)
5/8 ÷ 3/4 = 5/8 × 4/3 = (5×4)/(8×3) = 20/24 = 5/6
(3/4) / (9/8) = 2/3