There are 25 boys and 23 girls in class 52. There are three students asking for leave today. What is the percentage of attendance today?
23 + 25 = 48 (people); (48-3) △ 48, = 45 △ 48, = 1516; a: the number of people on duty today accounts for 1516
23 + 25 = 48 (people); (48-3) △ 48, = 45 △ 48, = 1516; a: the number of people on duty today accounts for 1516