Final answer:
To find out what percentage one number is of another number, divide the first number by the second number and multiply by 100. In this case, 20 is 40% of 50.
Step-by-step explanation:
To find out what percentage one number is of another number, we can divide the first number by the second number and multiply by 100. In this case, 20 is the first number and 50 is the second number. So, 20 divided by 50 equals 0.4. Multiply by 100 to get the percentage, which is 40%.
Learn more about finding percentages