Answer:
To simplify fractions you first look to see if you can take the top number divided by the bottom number and it comes out evenly
If that's now the case then you would see what number can go evenly into both the numerator and denominator
If that don't work then your fraction is simplified
In your case 3/3, if you take the top number divided by the first number than you would get 1, so this fraction simplified would be 1
Hope this helps ;)