Download - Wednesday, January 4 th
Wednesday, January 4th
• Get a new warm up template from the front
• Please write down the Homework
Warm UpSolve for x in each proportion
1. 2.1224 100
x 3 7
5 x
New Seating Chart
Corny Joke of the Day
Why did Columbus go to jail?
Because he double-crossed the ocean
EINSTEIN’S OF THE MONTH
Please hand in your goal sheet
MATH DISCUSSION
How do we convert decimals, fractions,
and percents?
Percents
%
%%
%%
%
%
%
%
%%%
%
%
What is a percent?A percent is a ratio…how many
times out of a hundered
45 %
= 45100
45 percent means 45 out of
100 possible times!
Percents to Fractions
Conversion 1
How can you turn a percent into a
fraction?
Percentages can be written as a fraction
by simply placing them over 100!
Write these percents as fractions. Be sure to simplify
1)30 %2)40 %3)12 %4)99 %5)101 %
3/102/53/2599/1001 1/100
Dude…That was
easy
Percents to Decimals
Conversion 2
Steps Since I can put all percents over a
hundred then all I need to do is write the equivalent decimal.
Move your decimal place over to the LEFT twice!20 % = 20
100= 0.20
You try…Percent to Decimal
6)12 %7)8 %8)75 %9)48 %10)120 %
0.120.080.750.481.20
Fractions to Percents
Conversion 3
Group DiscussionHow would you convert
each fraction to a percent?
Which fraction is easier to convert and why?
5/25 vs. 2/7
Setting it upSet up a ratio!!!
100xFraction
What percent is 5/40?
540
= P100
40 · P = 5 · 10040P = 50050040
= 12.5 %
100xFraction
Your turn…
11)4/10012)2/513)3/414)2/315)2 1/2
4 %40 %75 %66.6 %250 %
Decimals to Fractions
Conversion 4
StepsWhatever place value the fraction
ends in is your DENOMINATOR Make sure to simplify! From here you can go easily into
PERCENTS!!!!
Why is that?
0.43 = 10043
0.3 = 310 = P
100
10P = 30030010
P = 30 %
= 43 %
Complete Table Decimal Fraction Percent
.014/23
78%
SummaryWhen you make a decimal a percent
you can really move the decimal _______ places to the ___________.
When you make a fraction a percent you want to make an equivalent fraction that has a denominator of _____________________.
Percent MemoryIn your groups, play memory!
You must get a match of fraction to percent or decimal to percent