Final answer:
To change 9 out of 20 to a percentage, divide 9 by 20 and multiply by 100. The result is 45%.
Step-by-step explanation:
To change 9 out of 20 to a percentage, you divide 9 by 20 and multiply the result by 100. Let's do the calculation:
9 ÷ 20 = 0.45
0.45 × 100 = 45%
Therefore, 9 out of 20 is equal to 45%.
Learn more about converting fraction to a percentage