Answer:
11. B
12. A
Step-by-step explanation:
11. 18+7 is 25, so the whole class is made up off 25 students. Out of 25, eight are absent so that leaves seventeen students who have perfect attendance. That's 17÷25 which is .68 (68%).
12. Multiply 80% (0.80) to 50 and you'll get 40.