A tea company aims to sell 200g packets at a price that ensures a 30% profit margin, but due to machine errors, they only achieve a 25% profit. The equations derived show that the selling price, based on the intended profit, is $p = 1.3(200c)$, while the actual profit reflects $p = 1.25[(200+x)c]$. By dividing these equations, the relationship between the intended and actual profits can be analyzed. The solution for the additional tea per packet, denoted as x, can be determined through algebraic manipulation. This situation highlights the impact of operational errors on profit margins in product packaging.