Suha has a full 600 ml bottle of wallpaper remover.

she is going to mix some of the wallpaper remover with water,

here is the information on the label of the bottle.

wallpaper remover

600 ml

no

mix

of the wallpaper remover

with 4500 ml of water

suha is going to use 750 ml of water.

how many millilitres of wallpaper remover should suha use?

you must show your working.