Rounded problem: 15+8-4
multipling fractions rule is to multiply nominators and denominators separately
The method to multiply two fractions is: multiply the numerators (the numbers above) and this will be in the resulting numerator, and multiply the denominators (the numbers below) and this will be the resulting denominator.
the result is
because we don't have numerical values for and we just leave them indicated.
Here are the results of rounding these 3 numbers to the nearest one half:
14 7/8 => 15; 8 5/11 => 8 1/2; 4 2/17 => 4
Adding up 15, 8 1/2 and 4, we get 27 1/2.