Answer:
20/28 is your answer
Explanation:
First, find a common denominator. Note that what you do to the denominator, you must do to the numerator.
Multiply 7 to both numerator & denominator of 3/4
(3/4)(7/7) = 21/28
Subtract:
(21/28) - (1/28) = 20/28
20/28 is your answer
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