This document contains a math lesson on fractions, decimals, and percentages. It includes examples of converting between fractions, decimals, and percentages. The assignment is to complete set 12 of even problems for tomorrow. The lesson warm-up involves mean, converting yards to feet, prime factorization, and identifying number sets. Examples are provided for writing decimals as fractions and vice versa, as well as converting decimals to percentages and percentages to decimals. Problems are also given for ordering numbers, finding percentages of amounts, calculating sales tax, and estimating.

1. lesson 12.notebook September 11, 2012
Assignment:
1­­>Set 12 (evens) ­ Due Tomorrow (9/12)
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2. lesson 12.notebook September 11, 2012
Lesson 12 Warm­Up:
1) What is the "mean" of 30 and 40?
2) Ten yards is how many feet?
3) Use prime factorization to reduce: 50
[show your work...] 75
4) The number ­4 is a member of which sets of numbers? (List all possible sets)
5) What is 2/3 of 18?
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3. lesson 12.notebook September 11, 2012
Lesson 12:
*FYI...
*fractions to decimals , divide numerator by denominator
*decimals to fractions, "read" them
*decimals to percents , multiply by 100
*percents to decimals, divide by 100
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4. lesson 12.notebook September 11, 2012
Examples ­ Lesson 12
Use words to write the decimal numbers.
A) 11.12
B) 0.375
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5. lesson 12.notebook September 11, 2012
Write each fraction as a decimal number.
C) 3/5
D) 2 1/4
E) 1/200
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6. lesson 12.notebook September 11, 2012
Write each decimal as a fraction or mixed number.
F) 0.05
G) 0.025
H) 1.2
I) 0.001
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7. lesson 12.notebook September 11, 2012
Write each decimal as a percent.
J) 0.8
K) 1.3
L) 0.875
M) 0.002
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8. lesson 12.notebook September 11, 2012
Write each percent as a decimal.
N) 2%
O) 20%
P) 0.3%
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9. lesson 12.notebook September 11, 2012
Q) Order from least to greatest:
­0.4, 2.3, 0.6, 1/2
R) What length is 75% of 12 inches?
S) If the sales tax is 7.5%, what is the total sales tax on $48.00?
T) Estimate 8.25% sales tax on a $39.79 purchase.
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