Final answer:
The result of (9)/(10) - (4)/(5) is 1/10.
Step-by-step explanation:
To perform the indicated expression (9)/(10) - (4)/(5), we need to find a common denominator between 10 and 5, which is 10. We then rewrite the expression using this common denominator:
(9/10) - (4/5) = (9/10) - (8/10)
Now, we can subtract the numerators:
(9 - 8)/10 = 1/10
Therefore, the simplified result is 1/10.