So you need to find a number that goes into both of these numbers:
3 goes into both, so divide both by 3
27/3 = 9
42/3 = 14
so your answer is 9/14
8675 ÷ .5= 17350
You could also multiply by 2 to check your answer
17350 * .5= 8675
You could also divide by 2.
The first, third, and sixth are correct.