Out of the ratio 7 : 15, 15 : 23, 17 : 25 and 21 : 29 the

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Out of the ratio 7 : 15, 15 : 23, 17 : 25 and 21 : 29 the smallest one is ?

1. 17 : 25
2. 7 : 15
3. 15 : 23
4. 21 : 29

Correct Option: B

7 : 5 = 7/15 = 0.466
15 : 23 = 15/23 = 0.652
17 : 25 = 17/25 = 0.68
and 21 : 29 = 0.724
∴ The smallest one is 7 : 15.