If 2.5 of a number is equal to 0.75 of another number, the ratio of the numbers is :  Choose the correct choice from the following choices:
A) 2 :3	B) 3 :4	C) 3:10	D) 20 : 3	E) 30:7
2.5A = 0.75B   -&gt; A/B = 0.75/2.5 = 75/250 = 3/10   :. A : B = 3 : 10   ANSWER:3:10
<result>C</result>
If 2.5 of a number is equal to 0.75 of another number, the ratio of the numbers is :