Sonya expected to get 60$ for her birthday, but she only got 40$. what was the percentage decrease of the amount sonya recieved?
1 answer:
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A rational number is a number that can be written in the form:
Where p and q are coprimes. We are asked for finite sets, we can rule out options 3 and 4. In the set in option 2 the first element is:
This number cannot be written a ratio. We can rule out option 2.
All the elements in the set from option 1 can be written in the form p/q.Thus, the answer is the first option.