Firstly, it is pi, not phi.
Second, 22/7 is a ratio of 2 integers. It is, therefore a rational number. pi is not a rational number, so it cannot be 22/7. It is a near enough approximation, though.
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divide both by 5 35/5 = 7 110/5 = 22 35/110 = 7/22
22 / 7 x 90 = 282.85714
3 1/7
No, it is rational. A rational number is one which can be expressed as a ratio between two integers. Since 22 and 7 are both integers, then 22 over 7 is rational.
First, we make a common denominator: 18/22 - 11/22 Then, we simply subtract 11 from 18: 7 Then, we put the 7 over 22: 7/22. Therefore, 9/11 - 1/2 equals 7/22.