here is an example of how to solve your problem.
4 3/9 - 2 2/9 = ?
• Check for common denominators: They are like fractions with a common denominator of 9. Do nothing.
• Subtract the numerators from each fraction: 3 - 2 = 1
• Write the difference of the numerators above the common denominator: 1/9
• Subtract the whole numbers: 4 - 2 = 2
• Write out the new mixed number: 2 1/9
• Simplify: 1/9 can't be simplified. You are done.
Answer: 4 3/9 - 2 2/9 = 2 1/9
hope it helps;)