Answer :
Final answer:
To change numbers to percentages, divide the given number by the total and multiply by 100.
Explanation:
a) To change 7 out of 50 to a percentage, you divide 7 by 50 and then multiply by 100. The calculation would be (7 / 50) × 100 = 14%. Therefore, 7 out of 50 is equal to 14%.
b) To change 18 out of 20 to a percentage, you divide 18 by 20 and then multiply by 100. The calculation would be (18 / 20) × 100 = 90%. Therefore, 18 out of 20 is equal to 90%.
Learn more about Converting numbers to percentages here:
https://brainly.com/question/29895939
