1) The document provides a review for a test covering proportions and ratios. It includes example problems and questions about determining if ratios are proportional, solving proportions, and relating proportions to concepts of normal human physiology. 2) It asks students to consider example problems involving money contributions split in proportion to amounts contributed, sampling proportions from a population, using proportions to determine unknown lengths, and relating human proportions to definitions of normal. 3) The review covers converting fractions to percentages, solving proportions, interpreting nutrition information using percentages of daily recommendations, and relating government fat intake guidelines to information in a nutrition label.

2. Test # 2
>Tomorrow

3. The Week Ahead
Note Test &
CW Dates
In Your Grade
Trackers

5. Review Part I for Test #1
Proportions are defined as two equal ratios
Determine whether the following ratios are proportional:
14
21
,
2
3
17
16
,
9
8
2
6
3
5


x
Solve the proportion.
(Please wait before answering)
Is an exact number needed
to answer the question?
Let's compare
these ratios..
The numerator determines the 'winner'
The answer is 'no', because this, is larger than this

6. Review Part I for Test #1
Jay, Kay, and Elle put their money together to buy lottery
tickets. Jay contributed $6.00, Kay $10.00, and Elle $4.00.
They agreed that if they won the $120,000 jackpot, they would
split the winnings in the same ratio as their contributions.
How much richer will each be if they win?
One hundred students were surveyed. Ten percent said they
walked to and from school. If 250 students are surveyed,
what % of students would we expect to be walkers?
J = $36,000 K = $60,000 L = $24,000
100 students is a large enough sample size to
represent the entire school, so our answer is...

7. Review Part I for Test #1
Find the length of side x
102
x
15
The answer is...I don't know, and
neither do you
The answer cannot be determined
because the shapes are not similar.
That is, they are not different sizes
of the same shape.

8. Review Part I for Test #1
The final question for this section involves proportions.
Whether we are aware of it or not, proportions play a large role
in our understanding of what is 'normal' and what is not.
This includes our understanding of what a human being
should look like.
Da Vinci's sketch
was all about his
investigation into
proportions and the
human body.

9. Review Part I for Test #1
Does this person look
'normal' to you?
No, and not because his whole
head is smaller than it actually is,
but because he dosen't meet our
definition of 'normal' proportions.
Generally speaking, homo
sapien proportions are:
Yes, because you know that
even though her face in the
photo is smaller than her real
face, everything is smaller,
and thus proportional.
What defines 'normal' is the
relationship between the
different parts of her face.
What about him? 'Normal'?

10. Eight equal parts
Seven equal partsWith these proportions,
we would expect a 6 ft.
tall man to have knees
≈ how many inches off
the ground?
Each part is equal to the size of........
(72 ÷ 8)•2 = or,
(72 •
𝟏
𝟖
)•2 = or,
(72 •
𝟏
𝟒
) = or,
Solving by
proportions:
𝟕𝟐
𝟖
=
𝒙
𝟐
= 18

11. Review Parts II & III
Convert the following to an equivalent fraction:
𝟏
𝟐𝟎
% 10
𝟏
𝟐
% 820%
Change
𝟑𝟎𝟎
𝟔𝟑𝟎
into a percent.
The nutrition label states that a Big Mac has 1010 mg.(!!) of
sodium (salt) which is 42% of the recommended daily
intake. What is the (maximum) recommeded daily value of
salt intake (mg)? The government also recommends no
more than 70 total grams of fat be eaten in a day. How
many grams of fat does a Big Mac have?