# Find the ratio

One-half of a certain number is equal to 65 % of 2nd number. Find the ratio of 1st to 2nd number:

- 10:13
- 13:10
- 13:8
- 8:13

**Answer: (2) 13: 10**

**Solution:-
**Let the first number and second number be X and Y.

One-half of a certain number is equal to 65% of 2nd number.

Then X/2 = Y x 65/100

X = Y x 13/10

X/Y = 13/10

Then the ratio of 1st and 2nd number is 13: 10.

Hence, the correct answer is option (2) 13: 10.