Answer:
1. 2nd choice
2. 2nd choice
5. 2nd choice
6. 2nd choice
(I find these multiple choices questionable...)
Explanation: I'm honestly too lazy to do the math for the rest but the conversions can be done simply by using a ratio like ½ = ⅓ and you cross multiply (you'll probably have one side with a variable, just divide both sides by the number multiplied to the variable if necessary).