Which ratio is equivalent to the ratio 2 to 10?

2 : 5

1 to 10

one over three

3 : 15

Question

Which ratio is equivalent to the ratio 2 to 10? 

 2 : 5 

 1 to 10 

 one over three 

 3 : 15

anonymous · Answer

Well, the second number is 5 times as big as the first number. Which one of your answers has a second number that is 5 times as big as the first number?

anonymous · Answer

i don't know.... c???

anonymous · Answer

Well, just multiply the first number by 5, and if it equals the second number then it is equivalent to your original ratio.
2x5 = 10, which isn't your second number for the first option. 
This means it can't be the first option. 
Try this for the second option.

anonymous · Answer

oh so d

anonymous · Answer

Yup, the second option doesn't work...and the third option doesn't make any sense, so the answer is d. :)