Answer:
16 whole batches
1.12 ounces of sugar leftover
Explanation:
Let's convert fractions to decimal first
4 1/2 batches = 4.5 batches
Therefore to make 1 batch of brownies, the amount of sugar
=27.81 /4.5 ounces per batch
= 6.18 ounces per batch
If you have 100 ounces of sugar, the total number of batches of brownies that can be made:
= 100 ounces ÷ 6.18 ounces
= 1.61812 batches
Since we cannot have a fraction of a batch, that would mean we can make 16 whole batches
16 whole batches of sugar will take 16 x 6.18 ounces of sugar
16 x 6..18 = 98.88 ounces
Leftover sugar = 100 - 98.88 ounces
= 1.12 ounces
Verify calculations
16 batches of sugar will need 16 x 4.5/27.81