15% of 24000 is 3600
24000-3600 = $20,400
To multiply fractions you multiply the numerator and that becomes the answer to the numerator
And then you do the same for the denominator
Then simplify if you can
Example:
2/5 * 3/6 = 6/30 = 1/5
(-2x)(x^2)+(-2x)(-3) = -2x^3 + 6x
