Bruce is getting materials for a chemistry experiment. His teacher gives him a container that holds 0.25 litter of a blue liquid. Bruce needs to use 0.4 of this liquid for the experiment. How much blue liquid will Bruce use?
so he has 0.25 liter of liquid or 25/100 or 1/4 L of liquid
he wants to use .4 or 4/10 or 2/5 of the blue liquid or he wants to use 2/5 of 1/4 L so we can read 'of' as multiply and multiply 2/5 and 1/4 and get 2/20 or 1/10 Liter he will use