ratio

6. Using the ":" (colon)to
separate the values:
6:8
Instead of the ":" you
can use the word "to“
or “is to”:
6 to 8 or 6 is to 8
Or write it like a
fraction:
6
8

7. Example:
4 : 5 is the same as 4 2 : 5 2 = 8 : 10

8. "Part-to-Part" and "Part-to-Whole" Ratios
The examples so far have been "part-to-part"
(comparing one part to another part).
But a ratio can also show a part
compared to the whole lot.

9. Example: There are 5 pups, 2 are boys, and 3 are girls.
Part-to-Part:
The ratio of boys to girls is 2:3
or 2/3
The ratio of girls to boys is 3:2
or 3/2
Part-to-Whole:
The ratio of boys to all pups is
2:5 or 2/5
The ratio of girls to all pups is
3:5 or 3/5

10. 4: 3
3: 4
3: 7
4: 7

11. How to simplify Ratios?

15. 2/7 is the
reciprocal of
7/2
Simplest form

16. 36 ÷ 18 = 2
90 ÷18 = 5
18 is their
GCF
SIMPLEST FORM

17. WHAT IS THE GCF OF 45 and 50?

18. Lets review:
It is the comparison between two
quantities?
It is the numbers in Ratio?