Can someone help me ​

90 degrees

Step-by-step explanation:

For question 10, the answers would be 1/2=.05, 1/5=.02, and 3/4=.75

Step-by-step explanation:

When working with converting fractions to decimals, you're working with 100. 1/2 of 100 would be .05, which is.50. It could be easy to confuse .05 for 5.0 so remember to use 0.__<-- (your number).

For #12, the answer would be 50%. Out of 40 people, 20 said they do. half of 40 is 20, so like half of 100 is 50, it would be 50%. If you need extra help, KhanAcademy & Virtual Nerd are really great websites! Sorry this isn't the best or easiest explanation..

Good luck! :)