In this question, you know that the machine packs \(\frac{2}{3}\) of a box every \(\frac{1}{2}\) of a minute. Since it is constant, you simply have to double the half a minute to a full minute and then also double the rate to get \(\frac{4}{3}\) boxes packed per minute. And \(\frac{4}{3}\) is equal to \(1\frac{1}{3}\)
