Question

Write and solve a proportion to determine the number of pennies, x, in a stack that is 100 mm high. Use numbers, words, or both to explain your method.

Answer 1

100/w = x

The 100 mm is made up of pennies that have the same width. If you divide the 100 mm by how wide each penny is, you will get how many pennies there are in the stack.

Explanation: