Final answer:
To convert the given fractions to percents, multiply each fraction by 100.
Step-by-step explanation:
To convert a fraction to a percent, you can multiply the fraction by 100. Let's go through each example:
a. 7/25 = 7/25 * 100 = 28%
b. 3/10 = 3/10 * 100 = 30%
c. 3% = 3% as a fraction is 3/100
d. 21/125 = 21/125 * 100 = 16.8%
Learn more about Converting fractions to percents