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3/8 - 3/4 = 3/8 - 6/8 = (-3/8)
1/4 + 3/8 = 2/8 + 3/8 = 5/8
5/8 ÷ 3/4 = 5/8 × 4/3 = (5×4)/(8×3) = 20/24 = 5/6
2/4 + 3/8 = 7/8Lets normalize the denominators:since 2/4 = 4/8, we can say4/8 + 3/8When the denominators are the same, we simply add the enumerators.
The average of 1/2 and 1/4 is the average of 2/4 and 1/4 which is the average of 4/8 and 2/8 which is 3/8