To make a drawer that is 5 decimeters long, 3 decimeters wide and 1.5 decimeters high, how many square decimeters of wood is needed, and the thickness of the wood is ignored
5*3*2+1.5*3*2+1.5*5*2=54dm²
How many meters is left when 3 / 5 of a cloth is used
5/2*(1-3/5)=1
One meter left
43 square centimeter = fraction of square decimeter
43 per cent