60:120 or 1:2. Hope it helps
A) -1/2 or *0.5
B) - 
C) 1
D) θ
=
π
4
+
2
π
n
,
3
π
4
+
2
π
n
E) θ
=
2
π
3
+
2
π
n
,
4
π
3
+
2
π
n
Answer:
B) 3/6
c) 3/6
I hope this is the answer
Tenths: 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100%
fifths: 20%, 40%, 60%, 80%,100%
fourths: 25%, 50%, 75%, 100%
P.S. I'm doing this like:
tenths: something/10
fifths: something/5
fourths: something/4