To calculate the percent yield of the reaction, you can use the following formula:Percent Yield = Actual Yield / Theoretical Yield x 100In this case, the actual yield is 25 grams, and the theoretical yield is 30 grams. Plugging these values into the formula:Percent Yield = 25 / 30 x 100 = 0.8333 x 100 = 83.33%The percent yield of the reaction is 83.33%.