Sam is creating a homemade lava lamp using an empty 0.6-liter water bottle. He fills the 1.25 bottle with deciliters of colored water, and plans to fill the rest of the bottle with oil. How many milliliters of oil will he need?

475 milliliters of oil

Step-by-step explanation:

1 liter = 1000 milliliters

1 deciliter = 100 milliliters

To make it easier, we convert all our units to milliliters.

Volume of the water bottle = 0.6 liter

=0.6 X 1000 = 600 milliliters

Volume of colored water = 1.25 deciliters

=1.25 X 100 = 125 milliliters

Therefore:

Volume of oil needed to fill the bottle = 600-125

=475 milliliters