If the size of a fraction is equal to 18 / 24, the numerator is equal to 6, and the denominator is smaller than 24, what is the fraction? The answer is 3 / 7. What's the matter?

If the size of a fraction is equal to 18 / 24, the numerator is equal to 6, and the denominator is smaller than 24, what is the fraction? The answer is 3 / 7. What's the matter?

Wrong answer! It should be 6 / 8, that is: 3 / 4