1. 0.24% is 24/100 which is 0.24
2. 135% is 1.35, you are correct!
3. 1/5% is 20% or .20, correct again !
4. 0.75% is 3/4, awesome job!
5. 420% is 4 1/5, correct.
6. 5/1000 is .005%
7. 500% + 80% is 580%, correct.
8. 0.0045 is 0.0045%
9. 3 is a whole number, 3.00 so 300%