To calculate the percentage purity of the aspirin sample, we can use the following formula:Percentage Purity = Observed Melting Point / Literature Melting Point 100In this case, the observed melting point is 134.5C, and the literature melting point is 136C. Plugging these values into the formula, we get:Percentage Purity = 134.5 / 136 100Percentage Purity 98.9%Therefore, the purity of the aspirin sample is approximately 98.9%.