Question

What can 6/10 symplify to?

Answer 1

How you simplify fractions is figuring out what the highest number that can go into them is. 
I now that's a bit confusing but I'll explain.
In this case, 2 can go into both 10 and six, (because 2×5=10 and 2×3=6) and no higher number can, so the simplified version of 6/10 is 3/5. (the numbers we multiplied by 2)

Answer 2

6/10 can be simplify to?

6 divide by 2 is 3 ------ 10 divide by 2 is 5 ----- so 3/5
 Answer is 3/5