X=12, -9 I hope this somewhat helps you :)
False, it's the other way around: you divide the numerator by the denominator.
For example, to evaluate
you divide 8 by 15:

Which number means four hundred seven and six hundred fifty-two thousandths?
answer is
407.652
The difference starts off by 7. Then it continues to double. Then the answer is 14, 28, 42. The answer doubles every time.