Question

James is riding his bike at a speed of 23 feet per second, how many miles per hour is he riding his bike?

Answer 1

A handy conversion factor to remember is 60 mph = 88 feet per second.
So, (paying attention to units)
23 feet per sec x 60 mph / 88 feet per sec = 15.6818181818 mph or about
15.7 mph

Answer 2

Or if you want the answer (the LONG way)
23 feet / second * 3,600 seconds / hour * 1 mile / 5,280 feet =

15.6818181818 miles per hour

(Again, pay attention to units and make sure the correct ones cancel out).

Answer 3

so it will be 15.68181818