Which is in order from least to greatest

Question

A.1/4,0.33,2/5,0.5,2/3
B.1/3,1/2,0.4,0.25,2/3
C.1/3,1/4,0/4,1/2,0.66
D.2/3,0.5,2/5,0.33,1/4
A

Talent Show auditions were held after school. There were 3 groups who sang for every 2 groups that danced. If there were a total of 30 groups that auditioned how many can be expected to have sung
A.12
B.45
C.20
D.18
D

Answer 1

3 + 2 = 5

5 * 6 = 30

so 6 teams consisting each containing 3 singing and two dancing
6 * 3 singing groups = 18 singing groups

check
30 - 18 = 12
18/12 = 9/6 = 3/2 sure enough

Answer 2

Which is in order from least to greatest
A.1/4,0.33,2/5,0.5,2/3

Yes
A is
.25 , .33, .40, .50, .67

B.1/3,1/2,0.4,0.25,2/3
C.1/3,1/4,0/4,1/2,0.66
D.2/3,0.5,2/5,0.33,1/4