What is the answer for 6/7-5/9

Well I cannot tell you the answer but here are the steps to answering this question:
1. Subtraction needs to be 2 fractions with the same denominators so the way to do that is to find the factors and pick any that is the same factors for both numbers (it doesn't matter because whatever one you pick, you will get different answers but equivalent fractions which is still correct)
2. subtract only the numerators (the top number) but NOT the denominators (the bottom number) because if you do that, you will get 0 as the denominator and that gives you a negative number and that is a totally wrong answer
3. The sum is your answer!
hope you understood!
Just tell me if you didn't understand and I can tell you in a different way that is easier for you.