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Hi, this question talks about John having 3 hours of free time. He spends 45 minutes on homework, and one and half hours on games. We are asked to find how much free time he has left with him. So this question is about adding and subtracting unlike fractions. So we have 3 hours, 45 minutes, one and half hours given. Let us convert all these given times with the same units. If we consider hours, this is 3 hours. For this, we can write this as 45 minutes over 60 minutes. Which is going to be 3 by 4 hours. This we have one and half, which is the same as 3 over 2 hours. Lets visualize these, 3 hours as 3 squares. So let us consider 45 minutes, which is 3 by 4 hours as a square with four parts, with only three parts considered. 3 out of the total four. Next we have, 3 over 2, so that should be, one full square and a half square. Let us try to put this also in terms of four equal parts, that would look like. We also consider 3 hours with four equal parts, so that will be similar to this. The question says out of 3 hours, 45 minutes and one and half hours to be removed. So we try to subtract 45 minutes and one and half hours. So how do we do that? We need to remove these parts from the given. We also remove one and half, so that is going to be this, and this. We are left with one part here, and two parts here. Totally we have one, two and three parts left. They are nothing but 3 over 4. The answer is John is left with three fourth hours. Thank you.