College

**Review Your Math Skills**

Prepare for the lesson that follows by reviewing these math skills.

1. **Convert decimals to percentages** by moving the decimal two places to the right.
- A. [tex]$0.0145 \rightarrow$[/tex]
- B. [tex]$0.624 \rightarrow$[/tex]
- C. [tex]$0.75 \rightarrow$[/tex]
- D. [tex]$0.076 \rightarrow$[/tex]

2. **Add and subtract decimals.** Example: [tex]$471.80 - 263.90 = 207.90$[/tex]
- A. [tex]$51,178.46 + 9,704.63 =$[/tex]
- B. [tex]$2,078.95 - 708.06 =$[/tex]
- C. [tex]$918.27 + 1,036.15 =$[/tex]
- D. [tex]$7,819.69 - 3,800.99 =$[/tex]

3. **Divide decimals.** Round to the nearest thousandth (0.001). Example: [tex]$3.5 \div 214.1 = 0.016$[/tex]
- A. [tex]$75 \div 145 =$[/tex]
- B. [tex]$10.4 \div 263.7 =$[/tex]
- C. [tex]$2.8 \div 98.1 =$[/tex]
- D. [tex]$5.4 \div 378.1 =$[/tex]

Answer :

Sure! Let's work through the math tasks step by step.

### 1. Convert Decimals to Percentages

To convert a decimal to a percentage, move the decimal point two places to the right and add a percent sign.

A. [tex]\(0.0145\)[/tex] converts to:
- Move the decimal two places: [tex]\(1.45\)[/tex]
- So, it's [tex]\(1.45\%\)[/tex]

C. [tex]\(0.75\)[/tex] converts to:
- Move the decimal two places: [tex]\(75.0\)[/tex]
- So, it's [tex]\(75\%\)[/tex]

8. [tex]\(0.624\)[/tex] converts to:
- Move the decimal two places: [tex]\(62.4\)[/tex]
- So, it's [tex]\(62.4\%\)[/tex]

D. [tex]\(0.076\)[/tex] converts to:
- Move the decimal two places: [tex]\(7.6\)[/tex]
- So, it's [tex]\(7.6\%\)[/tex]

### 2. Add and Subtract Decimals

Let's perform the additions and subtractions:

A. [tex]\(51,178.46 + 9,704.63\)[/tex]:
- Add the numbers to get [tex]\(60,883.09\)[/tex]

C. [tex]\(918.27 + 1,036.15\)[/tex]:
- Add the numbers to get [tex]\(1,954.42\)[/tex]

B. [tex]\(2,078.95 - 708.06\)[/tex]:
- Subtract to get [tex]\(1,370.89\)[/tex]

D. [tex]\(7,819.69 - 3,800.99\)[/tex]:
- Subtract to get [tex]\(4,018.7\)[/tex]

### 3. Divide Decimals and Round to the Nearest Thousandth

Let's divide these numbers:

A. [tex]\(75 \div 145\)[/tex]:
- Divide and round to the nearest thousandth to get [tex]\(0.517\)[/tex]

C. [tex]\(2.8 \div 98.1\)[/tex]:
- Divide and round to the nearest thousandth to get [tex]\(0.029\)[/tex]

8. [tex]\(10.4 \div 263.7\)[/tex]:
- Divide and round to the nearest thousandth to get [tex]\(0.039\)[/tex]

D. [tex]\(5.4 \div 378.1\)[/tex]:
- Divide and round to the nearest thousandth to get [tex]\(0.014\)[/tex]

There you have all the steps detailed out!