You have to find a common denominator for both fractions. I chose the denominator to be 10, so the 1/2 will become 5/10, and 1/5 will become 2/10.
Subtract 5/10 from 2/10. You will get -3/10.
Answer: -3/10
You can check your answer by solving 1/2-3/10=1/5 to see if it is true. (It is:)
The answer to the question
Answer:
Hey there!
![\frac{3+2-4^2(7)-5+2}{16-6(6)^2}](https://tex.z-dn.net/?f=%5Cfrac%7B3%2B2-4%5E2%287%29-5%2B2%7D%7B16-6%286%29%5E2%7D)
![\frac{3+2-16(7)-5+2}{16-6(36)}](https://tex.z-dn.net/?f=%5Cfrac%7B3%2B2-16%287%29-5%2B2%7D%7B16-6%2836%29%7D)
![\frac{3+2-112-5+2}{16-216}](https://tex.z-dn.net/?f=%5Cfrac%7B3%2B2-112-5%2B2%7D%7B16-216%7D)
![\frac{-110}{-200}](https://tex.z-dn.net/?f=%5Cfrac%7B-110%7D%7B-200%7D)
![\frac{11}{20}](https://tex.z-dn.net/?f=%5Cfrac%7B11%7D%7B20%7D)
Let me know if this helps :)