Write each decimal as a percent.
$0.4$

Verified step by step guidance

1. Understand that to convert a decimal to a percent, you multiply the decimal by 100 and then add the percent symbol (%).
2. Start with the given decimal: 0.4.
3. Multiply 0.4 by 100: $0.4\times 100$.
4. Calculate the product (do not provide the final number here, just the operation).
5. Attach the percent symbol (%) to the result to express it as a percent.

Key Concepts

Decimal to Percent Conversion

Converting a decimal to a percent involves multiplying the decimal number by 100 and adding the percent symbol (%). This shifts the decimal point two places to the right, expressing the value as parts per hundred.

Understanding Percent

Percent means 'per hundred,' representing a ratio out of 100. It is a way to express fractions or decimals in a standardized form that is easy to compare and interpret.

Place Value and Decimal Points

Understanding place value helps in correctly moving the decimal point when converting decimals to percents. Each move to the right multiplies the number by 10, so moving two places right multiplies by 100.