Final answer:
To express 30 seconds as a percent of a minute, divide 30 by 60 and multiply by 100 to get 50%.
Step-by-step explanation:
To express 30 seconds as a percent of a minute, we need to compare it to the total number of seconds in a minute, which is 60 seconds. So, 30 seconds is a fraction of 60 seconds. To convert this fraction into a percent, we divide 30 by 60 and multiply by 100. 30/60 * 100 = 50%
Learn more about expressing fractions as percentages