Always read the question very carefully as it contains a lot of vital information's. Based on those information's the answer to the question can be easily deduced. Total number of questions given in a Chinese test = 40 Percentage of questions incorrectly answered by Kara = 10% Then Number of questions incorrectly answered by Kara = (10/100) * 40 = 4 Then The total number of questions correctly answered by Kara = 40 - 4 = 36 From the above deduction we can clearly see that Kara answered 36 questions correctly among the total of 40 Chinese questions that were given.