Answer:
62.5%.
Explanation:
To scale down a recipe from 72 mini-muffins to 45 mini-muffins, you would use a scaling factor. The scaling factor is calculated by dividing the desired yield (45 mini-muffins) by the original yield (72 mini-muffins).
So, the scaling factor would be 7245=0.625
This means that you would need to use 62.5% of the original amount of each ingredient in the recipe.