Question 132665

Yes.
Every fraction has three signs: sign of the fraction, sign of the numerator,
sign of the denominator.  You may change any two of the signs and still have
the same fraction.
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9/-15 = -27/P
Invert both sides to get:
-15/9 = P/-27
Reduce to get:
-5/3 = P/-27
Multiply both sides by -27 to solve for P:
P = -27(-5/3) 
P = 45
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Cheers,
Stan H.