Subtracting Fractions with Like Denominators
Subtract the fractions. For the unsimplified difference, subtract the numerators and keep the denominator. For the simplified difference, reduce the fraction to lowest terms as needed.
Subtraction ProblemUnsimplified DifferenceSimplified Difference
921321\displaystyle \frac{{9}}{{21}}-\frac{{3}}{{21}}    
2235735\displaystyle \frac{{22}}{{35}}-\frac{{7}}{{35}}