Adding, subtracting, multiplying, or dividing? or changing from fractions to decimals?
Adding & subtracting.... this youtube video might help
Multiplying.... you just multiply straight across (numerator * numerator, and denominator * denominator), then simplify if needed
Dividing.... you just flip the second fraction (denominator becomes numerator, and vice versa) and follow the same rules as multiplication
changing fractions to decimals is easy. just enter it into the calculator as is. if it's 29/55, just press 29, then division sign, then 55 and you'll get the decimal answer 0.527....
hope this helps?