For this case, the first thing we should do is subtract the following expressions: 2/5 of a tablespoon of cinnamon. 3/10 of a tablespoon of nutmeg. Subtracting we have: (2/5) - (3/10) We apply the cross product: ((2 * 10) - (3 * 5)) / (5 * 10) Rewriting: ((20) - (15)) / (50) (5) / (50) 1/10 Answer: Johnny did use 1/10 more cinnamon than nutmeg