Get them to have a common denominator so you can add them
(1/3)×2= 2/6 and (1/2)×3= 3/6
Add them together
(2/6)+ (3/6)= 5/6
So 5/6 of the class planted either marigolds or tulips and 1/6 of the class planted neither
The opposite of this problem is -1
4/8 = 1/2 so it is four eigths in one half. 4/8 simplified is 1/2
