Lucy is a dress maker. She sews 47\dfrac4774start fraction, 4, divided by, 7, end fraction of a dress in 34\dfrac3443start fraction, 3, divided by, 4, end fraction hour. Lucy sews at a constant rate. At this rate, how many dresses does Lucy sew in one hour?
Include fractions of dresses if applicable.

-4

step-by-step explanation:

(-4+8)=-(4-8)=-8+4=-4

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional