Final answer:
A percent is a number expressed as a part of 100. Fractions are converted to percentages by finding an equivalent fraction with a denominator of 100. Decimals are converted to percentages by multiplying by 100.
Step-by-step explanation:
A percent is a way of expressing a number as a part of 100. To write a fraction as a percent, you can start by converting the fraction to have a denominator of 100, if it doesn't already. For example, to convert the fraction 1/4 to a percent, you'd find an equivalent fraction with a denominator of 100, which is 25/100, and then write it as 25%. To convert a decimal to a percent, you multiply the decimal by 100 and add the percent symbol. So, 0.2 as a percent is 0.2 × 100, which equals 20%.
To convert a percent to a decimal, you divide the percent value by 100. For example, 75% as a decimal is 75 ÷ 100, which is 0.75. When calculating percents, you use the formula part divided by total, then multiply by 100 to find the percentage. For example, if 24 out of 100 students are present, you calculate the percent as (24 ÷ 100) × 100, which would be 24%.