1-5%-40% = 55%, and the number of qualified students and excellent students accounts for 55% of the total class.
22/55% = 40 people. There are 40 people in Class One.
12 ÷ 40 = 0.3 = 30%, with excellent students accounting for 30%.
10 ÷ 40 = 0.25 = 25%, and 25% passed the exam.
40 × 5% = 2 people, and the number of failures is 2 people.
40× 40% = 16 people, and the good number is 16 people.