Math Worksheet 2 Percentages of Whole Numbers online exercise for ... - Free Printable

Problem Overview:

The task is to calculate the given percentage of each value. This involves converting percentages into decimals and then multiplying them by the respective whole numbers.

Solution Approach:

1. Convert Percentage to Decimal:
- To convert a percentage to a decimal, divide it by 100.
- For example, \( 80\% = \frac{80}{100} = 0.8 \).

2. Multiply by the Whole Number:
- Once the percentage is converted to a decimal, multiply it by the given whole number.
- For example, \( 80\% \) of \( 80 \) is calculated as \( 0.8 \times 80 \).

3. Perform Calculations:
- Apply this method to each problem in the worksheet.

Step-by-Step Calculations:

#### 1. \( 80\% \) of \( 80 \)
\[
80\% = 0.8
\]
\[
0.8 \times 80 = 64
\]

#### 2. \( 100\% \) of \( 70 \)
\[
100\% = 1.0
\]
\[
1.0 \times 70 = 70
\]

#### 3. \( 20\% \) of \( 70 \)
\[
20\% = 0.2
\]
\[
0.2 \times 70 = 14
\]

#### 4. \( 30\% \) of \( 20 \)
\[
30\% = 0.3
\]
\[
0.3 \times 20 = 6
\]

#### 5. \( 70\% \) of \( 30 \)
\[
70\% = 0.7
\]
\[
0.7 \times 30 = 21
\]

#### 6. \( 20\% \) of \( 20 \)
\[
20\% = 0.2
\]
\[
0.2 \times 20 = 4
\]

#### 7. \( 90\% \) of \( 90 \)
\[
90\% = 0.9
\]
\[
0.9 \times 90 = 81
\]

#### 8. \( 100\% \) of \( 90 \)
\[
100\% = 1.0
\]
\[
1.0 \times 90 = 90
\]

#### 9. \( 80\% \) of \( 60 \)
\[
80\% = 0.8
\]
\[
0.8 \times 60 = 48
\]

#### 10. \( 10\% \) of \( 60 \)
\[
10\% = 0.1
\]
\[
0.1 \times 60 = 6
\]

#### 11. \( 50\% \) of \( 10 \)
\[
50\% = 0.5
\]
\[
0.5 \times 10 = 5
\]

#### 12. \( 40\% \) of \( 90 \)
\[
40\% = 0.4
\]
\[
0.4 \times 90 = 36
\]

#### 13. \( 60\% \) of \( 60 \)
\[
60\% = 0.6
\]
\[
0.6 \times 60 = 36
\]

#### 14. \( 60\% \) of \( 30 \)
\[
60\% = 0.6
\]
\[
0.6 \times 30 = 18
\]

#### 15. \( 30\% \) of \( 50 \)
\[
30\% = 0.3
\]
\[
0.3 \times 50 = 15
\]

#### 16. \( 40\% \) of \( 20 \)
\[
40\% = 0.4
\]
\[
0.4 \times 20 = 8
\]

Final Answers:

\[
\boxed{
\begin{array}{ll}
1. & 64 \\
2. & 70 \\
3. & 14 \\
4. & 6 \\
5. & 21 \\
6. & 4 \\
7. & 81 \\
8. & 90 \\
9. & 48 \\
10. & 6 \\
11. & 5 \\
12. & 36 \\
13. & 36 \\
14. & 18 \\
15. & 15 \\
16. & 8 \\
\end{array}
}
\]