Question

What fraction of a kilometer is 150 cm?

Answer 1

3/2000 is the answer 

Answer 2

A kilometer is 100,000 centimeters.
150 out of 100,000 is 150/100,000.
That is equal to 15/10,000.
It's also equal to 3/2,000.
That is as simplified as you can get.
Side note: as a decimal it is 0.0015.
Hope this helps!