Question

Which is the best buy?
12 tins of fish at K7.80 or 6 tins of fish at K4.20?​

Answer 1

Divide price by quantity of each and compare:

7.80 / 12 = o.65 per tin

4.20 / 6 = 0.70 per tin

12 for 7.80 is less per tin, so is the Best Buy.