If you are using ounces, it is 1 oz cartpet shampoo and 8 oz water.
Dissolve 1 part of this chemical in 50 parts water.
1 part water 2parts
Ocean water has about 32 parts salt per 1000 parts water, while fresh water generally has 1 part salt to 10,000 parts water.
1 part sugar to 2 parts water
1 part Portland cement, 2 parts dry sand, 3 parts dry aggregates, 1/2 part water
2 parts hydrogen and 1 part oxygen.
Some recipes (Or other mixes) might ask for 1 or more parts of water, 1 part being in relation to e.g. 3 parts of flour
10 parts water to 1 part acid
It's a bit like saying 2 cups powder to 1 cup water. The part could be anything i.e a cup, a liter, a bottle it doesn't matter as long as it is 2 to 1.
Water. 2 parts Hydrogen 1 part Oxygen
H20 2 parts hydrogen, 1 part oxygen
10 parts water to 1 part bleach