Finding Percents of numbers Using the Is over Of technique in conjunction with drawing percent bars.
-
Upload
lee-houston -
Category
Documents
-
view
214 -
download
0
Transcript of Finding Percents of numbers Using the Is over Of technique in conjunction with drawing percent bars.
![Page 1: Finding Percents of numbers Using the Is over Of technique in conjunction with drawing percent bars.](https://reader036.fdocuments.us/reader036/viewer/2022082819/56649f345503460f94c52341/html5/thumbnails/1.jpg)
Finding Percents of numbers
Using the Is over Of technique in conjunction with drawing
percent bars
![Page 2: Finding Percents of numbers Using the Is over Of technique in conjunction with drawing percent bars.](https://reader036.fdocuments.us/reader036/viewer/2022082819/56649f345503460f94c52341/html5/thumbnails/2.jpg)
What do you think is the answer??
• Find 25% of 20
• Let’s draw a picture.
x
100% 20
25%
![Page 3: Finding Percents of numbers Using the Is over Of technique in conjunction with drawing percent bars.](https://reader036.fdocuments.us/reader036/viewer/2022082819/56649f345503460f94c52341/html5/thumbnails/3.jpg)
Can you solve this as a proportion? • Find 25% of 20
• What would the proportion look like?
100%
x25%
20
10025
20x
X = 5
![Page 4: Finding Percents of numbers Using the Is over Of technique in conjunction with drawing percent bars.](https://reader036.fdocuments.us/reader036/viewer/2022082819/56649f345503460f94c52341/html5/thumbnails/4.jpg)
We can do this Mathematically by using a special
proportion...just find the following...The Percent – it is the easiest to find.
Just look for the % sign!
The “Of” number - it is always just behind the word of. It represents the total (or the whole.)
The “Is” number – This represents the part or the piece of the whole. (It may be near the word “is.”
![Page 5: Finding Percents of numbers Using the Is over Of technique in conjunction with drawing percent bars.](https://reader036.fdocuments.us/reader036/viewer/2022082819/56649f345503460f94c52341/html5/thumbnails/5.jpg)
Finding is, of or a Percent
Find the missing number by drawing a bar and using the proportion.
a) 15% of 900 is what?
100
%=
of
isUse the proportion…
15%
100% 900
?
10015
900x
x = 135
![Page 6: Finding Percents of numbers Using the Is over Of technique in conjunction with drawing percent bars.](https://reader036.fdocuments.us/reader036/viewer/2022082819/56649f345503460f94c52341/html5/thumbnails/6.jpg)
Finding is, of or a Percent
Find the missing number by drawing a bar and using
the proportion.
b) What % of 84 is 63?
100
%=
of
is
x%
100 84
63
100%
8463
X = 75%
![Page 7: Finding Percents of numbers Using the Is over Of technique in conjunction with drawing percent bars.](https://reader036.fdocuments.us/reader036/viewer/2022082819/56649f345503460f94c52341/html5/thumbnails/7.jpg)
Finding is, of or a Percent
c) 35% of what # is 7?
100
%=
of
is
Find the missing number by drawing a bar
and using the proportion.
35%
100 ?
710035
x7
X = 20
![Page 8: Finding Percents of numbers Using the Is over Of technique in conjunction with drawing percent bars.](https://reader036.fdocuments.us/reader036/viewer/2022082819/56649f345503460f94c52341/html5/thumbnails/8.jpg)
![Page 9: Finding Percents of numbers Using the Is over Of technique in conjunction with drawing percent bars.](https://reader036.fdocuments.us/reader036/viewer/2022082819/56649f345503460f94c52341/html5/thumbnails/9.jpg)