Respuesta :
Answer:
To divide fractions you have to multiply by the reciprocal of the second fraction:
(1/9)-(1/n) * 9/(1+9)
Now, focus on the left side of the multiplication sign. In order to subtract the 2 fractions, you need a common denominator, 9n. Multiply each fraction to make their denominators equal to 9n:
1/9 * n/n = n/9n
1/n * 9/9 = 9/9n
Now it should look like this: (n/9n) - (9/9n)
Subtract the 2 fractions to get: n-9/9n
The full problem should look like this: (n-9/9n) * 9/(1+9)
To help with simplifying later, you can cancel out the 9 in the denominator of the first fraction and the 9 in the numerator of the second fraction because 9/9 = 1.
Now you have: n-9/n * 1/(1+9)
Multiply across:
Numerator: n-9 * 1 = n-9
Denominator (distribute the n): n * 1+9 = n(1+9)
Your answer is: n-9/n(1+9)
