Answer:1. Loan balance when paid religiously.Percentage decrease Paying religiously reduces the loan balance, hence a percentage decrease. 2. Prices of basic commodities.Depends on the situation The prices of basic commodities can either increase or decrease depending on the situation. 3. The grades of a student who studies smarter.Percentage increase Studying smarter can lead to better grades, hence a percentage increase. 4. The population in the Philippines.Percentage increase The population in the Philippines increases over time, hence a percentage increase. 5. The number of COVID cases before the vaccines were invented.Depends on the situation The number of COVID cases can either increase or decrease depending on the situation. 6. The number of COVID cases after the vaccines were invented.Percentage decrease After vaccines, the number of COVID cases decreased, hence a percentage decrease. 7. The number of students who enroll in your school every year.Depends on the situation The number of students who enroll in your school every year depends on the situation.