Final answer:
The fraction 3/10 and the percent 30% are the best equivalents of the decimal 0.3.
Step-by-step explanation:
The decimal 0.3 can be written as the fraction 3/10 or as the percent 30%. To convert a decimal to a fraction, we can write the decimal as a fraction over 1, and then simplify the fraction if necessary. In this case, 0.3 can be written as 3/10. To convert a decimal to a percent, we multiply the decimal by 100. So, 0.3 multiplied by 100 gives us 30%.
Learn more about equivalent fractions and percentages