Respuesta :
Pedro still needs to practice 2/6 of an hour more which is equal to 1/3 of an hour (if you divide both the numerator and denominator by 2). To get this, you need to subtract 2/6 FROM 4/6
4/6 - 2/6 = 2/6 = 1/3
4/6 - 2/6 = 2/6 = 1/3