Lesson

Remembering how to read and write decimals will help us in this lesson. Let's try a practice problem to review.

Write the number "sixty six hundredths" as a decimal.

Worked Solution

Idea summary

A place value table for decimals:

Hundreds | Tens | Units | . | Tenths | Hundredths |
---|---|---|---|---|---|

\text{} |

We can use 0 as a placeholder for any empty place value columns.

This video looks at how to write decimals in percentage form.

Write 0.23 as a percentage.

Worked Solution

Idea summary

We can convert any decimal into a percentage by multiplying the decimal by 100, which is equivalent to increasing the place value of each digit by two places, and attaching a \% symbol.

This video looks at how to write percentages in decimal form.

Write 90\% as a decimal.

Worked Solution

Idea summary

- A percentage is an amount out of 100. For example 42\% is 42 out of 100.
- Decimals can also be written in hundredths, such as 0.42.
- 0.42 is the same as 42\%.