5/21.(-7/15)
Change these to equivalent fractions with a common denominator.
i still don't get it
Why are you using "algebra 2" as your subject when obviously this is elementary arithmetic?
Study this site for equivalent fractions.
http://www.mathsisfun.com/equivalent_fractions.html
To compute the expression (5/21) * (-7/15), we need to multiply the numerators together and multiply the denominators together.
First, let's multiply the numerators: 5 * (-7) = -35.
Next, let's multiply the denominators: 21 * 15 = 315.
So, the expression becomes -35/315.
Now, we can simplify the fraction by dividing both the numerator and denominator by their greatest common divisor (GCD).
The GCD of -35 and 315 is 35, since both numbers are divisible by 35.
Dividing -35 and 35 by 35, we get -1 and 1 respectively.
Similarly, dividing 315 and 35 by 35, we get 9 and 1 respectively.
Therefore, the simplified fraction is -1/9.