Final answer:
The question requires information to calculate the shrinkage when an offset is bent, but the critical details for calculation are not provided, making it impossible to give an exact fraction for the shrinkage.
Step-by-step explanation:
The question relates to the calculation of shrinkage that occurs when an offset is bent in a pipe or conduit run. However, the information provided does not contain specific details about the angle of the bend, the size of the offset, or the methodology to calculate the shrinkage. Normally, the shrinkage could be calculated using the properties of the material and the geometry of the offset, but without additional context or a specific formula, we are unable to provide a precise number for the shrinkage in fractional inches.