Johnny made an apple pie. He used 2/5 of a tablespoon of cinnamon and 3/10 of a tablespoon of nutmeg. How much more cinnamon than nutmeg did Johnny use?

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