To change something into another form, substance, state, or
product; or to transform something. To change from one use,
function, or purpose to another.

wat dooes convert mean in math like fractions to decimals and decimals to fractions.i ask that question because im doing www.firstinmath on the other line and it kept saying convert CONVERT CONVERT CONVERT.

You cannot. I think you mean how do you do molarity calculations maybe. To convert to litres, you have to have some volume or many more bits of information