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## Wednesday, October 12, 2011

Ratio : is a quantitative relation between two amounts showing the number of times one value contains or is contained within the other.
example: A ratio is a comparison of two numbers. Separate the two numbers in the ratio with a colon. you want to write the ratio of 3 and 12.We can write this as 3:12 or as a fraction 3/12, and we say the ratio is three to twelve.
Rate : A measure, quantity, or frequency,one measured against some other quantity or measure.
example: You have a family of four people; 2 adults, one 9 year old child, and one 5 year old child. You have selected the American Plan Package (basic cabin rate + 3 meals per day) as the best package for your family. You would like cabin #33. Your rate would be \$380.
Proportion: A part or number considered in comparative relation to a whole.
example: Solve for n: 1/2 = n/4. Using cross products we see that 2 × n = 1 × 4 =4, so 2 × n = 4. Dividing both sides by 2, n = 4 ÷ 2 so that n = 2.

5 hours to travel 360 miles is about _____mph
divided by 1
Hours 5 1
______ _______ = _________
Miles 360 1
divided by 1
As a playgroup worker, if I increase the amount of apple juice I am serving at the playgroup from 25 ml to 100 ml, how much should I increase the the orange juice to, to keep the quantities in the same proportion? The orange juice is 50 ml to start with.
divided by 4
a 25 100
________ ______ = ________
o 50 12.5
divided by 4

Find a video about using proportion and embed it in your post. Make sure you select the small size of the video.