They add up to 4/5
One half minus one fifth is 3 tenths
Hint: four-fifths of "seven" is "even". Now how is one-third of one-half "el"?
One half of one fifth is one tenth. You just 'double' the denominator if you want to get half of the fraction.
The term "a fifth" refers to one fifth of a gallon. One fifth of a gallon = 750ml. Therefore, a fifth of Hennessy = One 750ml bottle of Hennessy. :-)
One half is bigger.
15 and one half divided by 2 and one fifth = 7.5