Answer:
3 cans cost 2
1 can cost 2/3
I wrote 2/3 to make it easier so you don't have to write in cents
2/3 can be spend to buy 1 can
12 can be spend to buy (2/3)(12) can
(2/3)(12)=8 cans
So the answer is 8 cans
You can buy 8 cans of tuna with 12 dollars