5.1 Subtracting a fraction from a whole
Rewrite the whole as a fraction using 2 as the denominator :
8 8 • 2 8 = — = ————— 1 2
Equivalent fraction : The fraction thus generated looks different but has the same value as the whole
Common denominator : The equivalent fraction and the other fraction involved in the calculation share the same denominator
Adding fractions that have a common denominator :
5.2 Adding up the two equivalent fractions
8 • 2 - ((r-12)) 28 - r ———————————————— = —————— 2 2 Final result : 28 - r —————— 2