Saturday, December 16, 2006

Kris's percentage growing post

(1) What is a good definition of percent? You should use words, symbols, pictures and numerical examples in your definition.

Percent: A number that shows parts of a whole, usually out of 100.

(2)How are three fifths (3/5), 3:2, 60% and 0.6 all the same? Use pictures and words to show your answer.

3/5, 3:2, 60% and 0.6 are the same because 3/5 equals 0.6, 3:2 equals 0.6, 60% equals 0.6 and 0.6 equals 60%. This means that all of them equal 60%.

(3)Show 3 different ways of finding 35% of 80.
a: 80/100=0.8x35=28. 28 is 35% of 80.
b: 0.8x35=25
c: 8 (10%) 8x3=24(30%) +4(5%) =28
http://linden8z.blogspot.com/ , "Percentages The Real Deal" The examples used on this post are very clear and easy to understand the first time around and may answer any questions anyone has about percentages.
(5)The principal announced that 50% of the children in Ms. Stanzi's class met their reading goal for the month and that 55% of the children in Ms Lowrey's class met their reading goal for the month. Ms Stanzi said that a greater number of her students met their reading goal. Could Ms Stanzi be correct? Why or Why not.

Ms. Stanzi could be correct if her class had more students than Ms. Lowrey's class.
Example: suppose Ms. Stanzi's class had 30 students and Ms. Lowrey's class had only 20 students. 50% of 30 would be 15 [30/100=0.3(1%) x 50=15(50%)] and 55% of 20 would be 11[20/100=0.3(1%) x 55=11(55%)].
(6)Use a hundred grid (unit square) to illustrate the following questions. Once you have explained and illustrated what the question means solve it.
a) 16 is 40% of what number?
-40/40=1
-16/40=0.4
-0.4x100=40
-16/40=40/100
b) What is 120% of 30?
-30/5=6x6=36
END

maryrose said...

Hey kris!
nice growing post, but to get a few more marks, add hundred grids to questions 6 for a & b :)

KriS™ said...

Setup
5/5
Question 1
7/10
Question 2
7/10
Question 3
6/10
Question 4
2/5
Question 5
5/10
Question 6
7.5/15

Overall Mark
39.5/65
Overall Comment for the Growing Post