Algebra-1

To determine which ratio forms a proportion with 6:7, we need to check which of the given ratios is equal to 6:7. We can simplify each option and compare them directly.

 

Option A, 12:15

Simplify 12:15 by dividing both terms by 3:

12:15 = 4:5

12:15 simplifies to 4:5. This is not equal to 6:7, so it is not proportional to 6:7.

 

Option B, 18:21

Simplify 12:15 by dividing both terms by 3:

18:21 = 6:7

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