no because the most you can reduce 15 over 18 is 5 over 6
no
15 over 25 reduces to 3 over 5
It is 3 over 4.
Yes.
Yes.
No you can not. 15 and 41 do not have a common factor
You cannot reduce 23/6. 23 is a prime number.
1/5
To 5/33
-6/6 is equivalent to -1.
No, not all of those fractions are equivalent. 5/20 reduces to 1/4. 8/40, 3/15, and 6/30 reduce to 1/5, so they are equivalent.