Answer:Solutions:Problem 1: Ms. Losinio's Class * a. Swept the floor: 25% of 40 pupils = 0.25 * 40 = 10 pupils * b. Wiped tables and chairs: 20% of 40 pupils = 0.20 * 40 = 8 pupils * c. Fixed books in the cabinet: 40% of 40 pupils = 0.40 * 40 = 16 pupils * d. Arranged the chairs: 15% of 40 pupils (remaining after the other tasks) = 0.15 * 40 = 6 pupilsProblem 2: Vivian's Birthday Party * a. What is asked in the problem? The percentage of guests who did not attend the party. * b. Identify the given facts: Percentage = unknown, Base = 100 guests, Rate = 56 guests attended * c. Number sentence/formula: Percentage = (Rate / Base) * 100 * d. Solve and answer: Percentage = (56 / 100) * 100 = 56% did not attend.Problem 3: Evacuation During Typhoon * a. What is asked in the problem? The total number of families living in the affected area. * b. Identify the given facts: Percentage = 40%, Rate = 25 families, Base = unknown * c. Number sentence/formula: Base = Rate / (Percentage / 100) * d. Solve and answer: Base = 25 families / (40 / 100) = 25 families / 0.40 = 62.5 families (Approximately 63 families)