If a job can be completed in 4 hr, then the rate of work is __ of the job per hour.

1 divided by 4 is 0.25 or 1/4

To find the rate of work, split up the hour by 4. So, 1 divided by 4.  This makes .25 (also written as 1/4).  So the rate of work is 1/4 of the job per hour.

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