Percent

toc =Percent=

Problem 1 (also open ended)
Ratio Table: 75% of 420 students is 315 students. ___
 * **Students** || **Percent** ||
 * 420 || 100 ||
 * 21 || 5 ||
 * 315 || 75 ||

325/500=0.65 0.65x100=65 65%

325 of 500 students is equivalent to 65%.

I **agree** that the principle should be happy about the result. My reason is because the percentage of students that were late, has lowered over one year. In 2004, 75% (315) of 420 students were late. The next year, 65% (325) of 500 students were late. So if you compare the two percentages, 65% is LOWER than 75%. I chose to go with the percent of students, rather than the number of students to compare because percents have the same whole/denominator. For example, if you are comparing fractions, you aren't going to compare them if they both have different denominators; you would rather compare them if they had the same denominator, this is a lot easier and is better for comparison. So all fractions are out of 100 (denominator) and finding the percentage is like the numerator. In this case, it is like saying: In 2004, 75/100 students were late. In 2005, 65/100 students were late. It is easier to see that 65, is LOWER than 75. Instead of saying 65/100, we simply say 65%.

Answered by Kevin 817