Simplify n!/(n-1)! (Factorial Problem)
You can simplify this factorial easily IF you know what factorials represent
n! is the product of n and all the numbers below it, including 1.
(n-1)! is the product of all the numbers from n-1 down to 1 as well.
The only factor that is in the numerator and NOT in the denominator is n. All of the others cancel out.