Final answer:
The number 21 is 28% of 75, which is found by calculating the ratio 21/75 and converting it to a percentage by multiplying by 100.
Step-by-step explanation:
To find out what percent the number 21 is of 75, we need to calculate the ratio of 21 to 75 and then convert that ratio to a percentage. The formula to calculate the percentage is:
Percentage = (Part / Whole) × 100%
Applying the numbers given in the question, we have:
Percentage = (21 / 75) × 100%
Percentage = 0.28 × 100%
Percentage = 28%
Therefore, the number 21 is 28% of 75.
The process of finding this percentage is quite straightforward and engages basic mathematical operations which include division and multiplication. To calculate what percent 21 is of 75, we can use the following formula: (21 / 75) * 100. This formula represents the fraction of 21 out of 75, multiplied by 100 to convert it to a percentage. Simplifying this expression, we get (7 / 25) * 100 = 28%. Therefore, 21 is 28% of 75.