If 70% of an equal to 40% of b, then ratio between a and b is?
Choices:
A) 4: 7  B) 4: 9  C) 4: 2  D) 4: 1  E) 4: 5
Explanation:   70 a = 40 b   a: b = 4: 7   4: 7nswer:4: 7
<result>A</result>
If 70% of an equal to 40% of b, then ratio between a and b is?