Answer: About 1 yard is a reasonable estimate.
Explanation:
1 ⁷/₁₄ is a yard and a half
⁹/₁₄ is just a bit more than half a yard
Rounding that off to half a yard, and finding the difference leaves about 1 yard.
The actual difference is ¹²/₁₄ of a yard the same as ⁶/₇ of a yard, or just about 5¹/₂ inches less than a yard.