==============================================
Work Shown:
(91 packages)/(2 hours) = (x packages)/(8 hours)
91/2 = x/8
91*8 = 2*x .... cross multiply
728 = 2x
2x = 728
x = 728/2 .... divide both sides by 2
x = 364
-----------------
Another approach:
If he delivers 91 packages in 2 hours, then his unit rate is 91/2 = 45.5 packages per hour. Multiply this by the 8 hours
8*45.5 = 364
