Which Are You?
Boy Girl
Which Do You Prefer?
pizza wings
Did you watch the USA vs.
Canada hockey game?
yes no
Ratios
A ratio is a comparison of two items that are measured using the
same unit of measure.
Examples:
- Boys to Girls (unit of measure = people)
- Hours of HW to Hours of TV
- Potato Chips you eat to Potato Chips Mr. F. eats
- Your turn to think of one… discuss at your table
Rates vs. Ratios
Rates and ratios are like identical twins. They look exactly the same,
they are solved the same exact way, but there is one major
difference.
The difference we care about is the unit of measure…
Same Unit = Ratio
Different Unit = Rate
Rates vs. Ratios
Can you figure out which of the following is a rate?
Which is a ratio?
1) Cards Up to Cards Down
2) Shots Made to Shots Missed
3) Miles per Hour
4) Calories per Serving
5) Students in Band to Students in 6th Grade
SO WHAT IS THE DIFFERENCE?
This year the Green
Bay Packers finished
with a record of 11
wins and 5 loses. We
can represent this
information in a variety
of ratios…
Part-to-Part:
• A ratio that compares parts of
information.
• In this case the ratio would be
games won to games lost.
• The ratio would be…
Part-to-Whole:
• A ratio that compares a part of the
information to all of the information.
• In this case it would be games won
to all games
• The ratio would be…