One nickel is 39/500 inch thick. Fifteen nickels are stacked vertically. How many inches tall is the stack?

Question

Give answer as a decimal.

Answer 1

If we stack 15 nickels on top of one another, the thickness is 15 times as much as one nickel. 

 

Height = 15 * (39 / 500)

 

Height = 117 / 100

 

Height = 1.17 inches

Answer 2

(39/500)*(15) = 585/500 = 1 ⁸⁵/₅₀₀ = 1 ¹⁷/₁₀₀ = 1.17 inches