text: can someone tell me how to add,subtract,multiply and divide fractions?   adding - first make a common denominator (bottom number), and then add the tops together.   subtract - see above, only subtract. multiply - multiply the numerators (tops) by each other for a new numerator, and multiply the denominators by each other for a new one. divide - invert the 2nd fraction (if it was 3 over 6, now make it 6 over 3), and then multiply.  good luck!