Katie bought a dozen buttons for $2.52. How much was each button?
1 Answer
This is why the shortcut method used by Aiyan works
Explanation:
12 buttons cost $2.52
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Write the given information as a ratio in fraction format. We need to find cost so use that as the numerator (top).
To change the 12 buttons into 1 button divide it by 12.
To keep the ratio in the correct proportion we also need to divide the top (numerator) by 12 as well:
So 1 button costs $0.21