Answer
$\frac{1}{4} \ in, \frac{1}{8} \ in, 0.0714, 7.14\%$
Work Step by Step
For the given measurement, we have
The precision is $\frac{1}{4} \ in$
The greatest possible error is one-half the precision
$\frac{1}{2}\cdot \frac{1}{4} \ in= \frac{1}{8} \ in$
The relative error is
$relative~error=\dfrac{greatest~possible~error}{measurement}$
$\frac{ \frac{1}{8} \ in}{1\frac{3}{4} \ in}=0.071$
The percent of error is $7.1\%$
