A city water tank holds 20 gallons of water. A technician empties 25% of the tank. How many more gallons of water must be removed from the tank so that it has of the water that it started with?

Respuesta :

if i undersood i need to find how much is full tank - 20/100*25 +20=25 2/5 of full tank is 2/5 of 25 and it is 10