Chapter 4 - Section 4.7 - Relative Error and Percent of Error - Exercise - Page 191: 3

1 rpm; 0.5 rpm; 0.00057; 0.06%

For the measurement 875 rpm, we have: The precision is 1 rpm The greatest possible error is one-half the precision: $0.5\cdot 1 \ rpm=0.5 \ rpm$ The relative error is $relative~error=\dfrac{greatest~possible~error}{measurement}$ $\frac{0.5\ rpm}{875\ rpm}=0.00057$ The percent of error is $0.057\%$.