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Anonymous
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7/9
Both 21 and 9 can be divided by 3. 21/3=7 9/3=3 So 21 over 9 can be simplified to 7 over 3.
28/9 x 4/7 = 1 and 7/9
yes. 3/9 is only 33%(3/9x100) and 7/9 is 78%(3/9x100)
The answer is -3 over 9