Answer:
4/10 of a pitcher
Step-by-step explanation:
Jaxon drank 2/5 = 0.2 = 4/10
Kesha drank 0.4 = 4/10
Luann drank 1/2 = 5/10
4/10 + 4/10 + 5/10 = 13/10 = 26/30
Which would leave Samuel to drink the remaining 4/10 of the soda.
Hope this helps (sorry if its confusing)