A ratio compares two quantities, expressing the relationship between an amount of one thing to an amount of another. For example, a ratio of 1:3 means that for every 1 of the first thing there are 3 of the second thing. To calculate the unknown quantity from a known ratio and one known amount, set up the ratio as a fraction and use algebra to solve. For example, if the ratio of hats to shirts is 2:3 and there are 20 hats, the number of shirts can be calculated as 30.
19. That means that for every 1 Mormon
there are 2 Catholics.
1 LDS
=
20. That means that for every 1 Mormon
there are 2 Catholics.
1 LDS 1
2
Catholics=
21. So, what does the ratio 3:4 between
copies of the Book of Mormon and
copies of the Bible mean?
22. So, what does the ratio 3:4 between
copies of the Book of Mormon and
copies of the Bible mean?
Answer?
23. So, what does the ratio 3:4 between
copies of the Book of Mormon and
copies of the Bible mean?
Answer:
For every three copies of the Book of Mormon
24. So, what does the ratio 3:4 between
copies of the Book of Mormon and
copies of the Bible mean?
Answer:
For every three copies of the Book of Mormon
25. So, what does the ratio 3:4 between
copies of the Book of Mormon and
copies of the Bible mean?
Answer:
For every three copies of the Book of Mormon
There are four copies of the Bible
26. If you know the ratio and the actual
amount of something you can find out
how much of the other thing there is.
27. If the ratio of hats to shirts is 2:3 and
there are 20 hats, how may shirts are
there?
28. If the ratio of hats to shirts is 2:3 and
there are 20 hats, how may shirts are
there?
All you do is take the 2:3 and turn it into a
fraction:
2
3
29. If the ratio of hats to shirts is 2:3 and
there are 20 hats, how may shirts are
there?
Then match the top ratio number (numerator)
with the actual number
2
3
20
x
30. If the ratio of hats to shirts is 2:3 and
there are 20 hats, how may shirts are
there?
And then the bottom number ratio (3) with it’s
number. But in this case we don’t know that
number so we put X
2
3
20
x
31. If the ratio of hats to shirts is 2:3 and
there are 20 hats, how may shirts are
there?
And then the bottom number ratio (3) with it’s
number. But in this case we don’t know that
number so we put X
2
3
20
x
32. If the ratio of hats to shirts is 2:3 and
there are 20 hats, how may shirts are
there?
And then the bottom number ratio (3) with it’s
number. But in this case we don’t know that
number so we put X
2
3
20
x
=
33. If the ratio of hats to shirts is 2:3 and
there are 20 hats, how may shirts are
there?
Let’s use algebra to solve it:
2
3
20
x
=
34. If the ratio of hats to shirts is 2:3 and
there are 20 hats, how may shirts are
there?
Multiply both sides by X
2
3
20
x
=
35. If the ratio of hats to shirts is 2:3 and
there are 20 hats, how may shirts are
there?
Multiply both sides by X
2
3
20
x
=X* *X
36. If the ratio of hats to shirts is 2:3 and
there are 20 hats, how may shirts are
there?
Multiply both sides by X
2
3
20
x
=X*
37. If the ratio of hats to shirts is 2:3 and
there are 20 hats, how may shirts are
there?
Multiply both sides by X
2
3
20
x
=X
38. If the ratio of hats to shirts is 2:3 and
there are 20 hats, how may shirts are
there?
Multiply both sides by 3
2
3
20
x
=X3*
39. If the ratio of hats to shirts is 2:3 and
there are 20 hats, how may shirts are
there?
Multiply both sides by 3
2
3
20
x
=X3* *3
40. If the ratio of hats to shirts is 2:3 and
there are 20 hats, how may shirts are
there?
Multiply both sides by 3
2
3
20
x
=X3* *3
41. If the ratio of hats to shirts is 2:3 and
there are 20 hats, how may shirts are
there?
Multiply both sides by 3
2
3
20
x
=X *3
42. If the ratio of hats to shirts is 2:3 and
there are 20 hats, how may shirts are
there?
Multiply both sides by 3
2
3
60
x
=X
43. If the ratio of hats to shirts is 2:3 and
there are 20 hats, how may shirts are
there?
Divide both sides by 2
2
3
60
x
=X
2 2
44. If the ratio of hats to shirts is 2:3 and
there are 20 hats, how may shirts are
there?
Divide both sides by 2
2
3
60
x
=X
2 2
45. If the ratio of hats to shirts is 2:3 and
there are 20 hats, how may shirts are
there?
Divide both sides by 2
3
30
x
=X