Since this question is asking for an estimate, you have to round 2.8 to the nearest whole number. 2.8 is closer to 3 rather than 2. Since 6 is already a whole, divide 3 by 6, which is 1/2 or 0.5. If you were to solve this problem without estimating, you would get 0.4666666666, which rounds to 0.5, but the question asks for an estimate.
