Leila mixes red dye and yellow dye in the ratio 5:4 to make 2.7 liters of orange dye. what is the volume of yellow dye used?

Add up the ratio first. (5:4 = 5 + 4 = 9 parts total.)

Then divide the sum of the ratio by the total amount of orange dye. (2.7 : 9 = 0.3 = 1 part.)

Now that we know what 1 part of the ratio is, we multiply 0.3 (1 part) by 4 (because yellow makes up 4 parts of the 5:4 ratio) = 1.2 liters.

The volume of yellow dye used = 1.2 liters.