Which operation is unnecessary when converting a decimal to a percentage?

Which operation is unnecessary when converting a decimal to a percentage?

• A. Moving the decimal point
• B. Adding a percentage sign
• C. Multiplying by 100
• D. Subtracting from the total

Answer: (D)

To convert a decimal to a percentage, the primary operations involved are moving the decimal point and multiplying by 100. When you multiply a decimal by 100, it effectively shifts the decimal point two places to the right, which is why moving the decimal point is also a recognized part of the conversion process. After performing these operations, you then attach a percentage sign to indicate that the value is now a percentage. In this context, subtracting from the total does not play any role in the conversion of a decimal to a percentage. It is an unrelated operation not involved in the basic process of changing a decimal into its percentage form. Therefore, this operation is indeed unnecessary when converting a decimal to a percentage.

To convert a decimal to a percentage, the primary operations involved are moving the decimal point and multiplying by 100. When you multiply a decimal by 100, it effectively shifts the decimal point two places to the right, which is why moving the decimal point is also a recognized part of the conversion process. After performing these operations, you then attach a percentage sign to indicate that the value is now a percentage.

In this context, subtracting from the total does not play any role in the conversion of a decimal to a percentage. It is an unrelated operation not involved in the basic process of changing a decimal into its percentage form. Therefore, this operation is indeed unnecessary when converting a decimal to a percentage.