25/28
is in it's lowest form, as it cannot be reduced anymore.
25/28 = 0.8928571
hope this helps
To simplify mixed numbers, Divide 13 and 7. We get 1 R 6. Since the remainder is out of 7, the mixed number would be 1 6/7
Hope this helps!
Answer

Solution
Simplify both sides of the equation.

We are left with d = 4+
Add

Hence, d = 
The greatest common factor of 66 and 42 is 6
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