[header] How to make chemical solutions [title] Define a percent by weight/volume solution. [step] A percent solution simply means parts per hundred. For example by weight: a 10% solution by weight simply means that you have 10 grams of compound dissolved in 100 ml of solution. 
[substeps] For an example by volume: a 23% solution by volume simply means that you have 23 ml of liquid compound in every 100 ml of solution. [title] Identify the volume of solution you want to make.