## Wednesday, October 12, 2011

### Janessa's Proportion Post

Ratios :
Two-term-ratio - compares two quantities measured in the same units .
Written has a:b or a to b .
Three-term ratio - compares quantities measured in the same units .Written as a:b:c or a to b to c .
Part-to-part ratio - compares different of a group to each other.
10:8 is a part-to-part ratio of 10 black beans and 8 red beads.
Part-to-whole ratio - compares one part of the group to the whole group.
5:23 is a part-to-whole ratio of blue beads to

Rate - A comparison of two quantities measured in different units.
EX: \$1.69per grams or \$1.69/100g that is a rate for purchasing food at bulk barn.
Unit rate - A rate which the second term is one.
EX: 64 beats/min (minute is a unit rate.)
Proportion -The relationship of two variables whose ratio is constant.

1. 5 hours to travel 360 miles is about 72 mph

2.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.

What are the three ways you can prove that equivalent ratio statements are true?
3/4=12/16 multiply diagonally from top left and bottom right and vertically, and horizontally
Here is a video to help you with proportions . I don't know how to get the video on here , so here is a link