Final answer:
The correct way to calculate a 4.2% tax on $63.78 is to convert the percentage to a decimal (0.042) and multiply it by the amount. Multiplying 4.2 by 63.78 is incorrect; the statement is false.
Step-by-step explanation:
To calculate the percent tax on $63.78, you should not multiply 4.2 by 63.78 because 4.2 is not the correct way to write a percentage. Instead, you need to convert the percentage to a decimal first and then multiply it by the total amount. If the sales tax is 4.2%, you would convert it to a decimal (4.2% = 0.042) and then multiply it by $63.78 to get the amount of tax.
Here is the correct calculation:
- Convert the sales tax rate from a percent to a decimal: 4.2% = 0.042.
- Multiply the decimal by the total amount: 0.042 × $63.78.
- Complete the multiplication to find the tax amount: $2.68 (rounded to the nearest cent).
Therefore, the correct statement is that to calculate a 4.2% tax on $63.78, you should multiply 0.042 times 63.78, not 4.2 times 63.78. The answer to the asked question is b) False.