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Anonymous
Yes, 3/21 = 1/7 (divide by 3)
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3/21 = 1/7
1 over 3 7/21 = 1/3
21/63 = 1/3
9/21 = 3/7 = .4286
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.