FRAME NUMBER 10
LEVEL A
RULE NO. 4. In finding the ratio of two numbers, both numbers must be expressed first in the
same unit of measure. Example: To find the ratio of 3 feet to 5 inches, the feet should first be
converted to inches.
3 x 12"
36"
1
or
7.2
or
1
:1
or
(7.2:1)
7
=
=
7
5
5"
5
1
5
1
Find the ratio to the following:
a. 2 feet to 2 yards
b. 2 inches to 3 yards
c. 5 miles to 3 feet
FRAME NUMBER 23
LEVEL B
There are two types of proportion, direct and inverse. Direct proportion is when an increase in
one quantity causes a proportional increase in another quantity, or when a decrease in one quantity
causes a proportional
in another quantity.
FRAME NUMBER 36
LEVEL C
You have a map of 1:45,000 scale which you want to use on a fishing trip. The route you want
to take measures 21.12 inches on the map. What is the ground distance, in miles?
21
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