A rectangular fish tank is 80% filled with water. <hr>The ratio of the volume of water in the tank to the volume of water that can still be added before the tank becomes full is <input min="0" type="number" id ="imp5pg238q10a_1" class="lineinput" placeholder="?" /> : <input min="0" type="number" id ="imp5pg238q10a_2" class="lineinput" placeholder="?" />