Abaker is looking for a recipe that has the lowest unit rate for flour per batch of muffins. which recipe should she use?
a
1
2
cup flour for
2
3
batch
b
1
3
cup flour for
1
4
batch
c
2
3
cup flour for
1
2
batch
d
3
4
cup flour for
2
3
batch

Ok so to find best price, find cost per unit or unit  rate

so what we do is
(amount of flower x batches)/x and divide out
when dividng fractions, just invert the second one and multiply, example
3/4 divided by 5/6=3/4 times 6/5=18/20 so

A.1/2 cup for 2/3, (1/2)/(2/3), 1/2 times 3/2, 3/4 cup per batch

B. 1/3 per 1/4 batch, (1/3)/(1/4), 1/3 times 4/1, 4/3 cup per batch=1 and 1/3

C. 2/3 cup for 1/2 batch, (2/3)/(1/2), 2/3 times 2/1, 4/3 cp per batch=1 and 1/3

D. 3/4 cup per 2/3 batch, (3/4)/(2/3), 3/4 times 3/2, 9/8 cup per batch=1 and 18/

lowest unit rate is 3/4 cup per batch since others are greater than 1

answer is A