To show a fraction or a decimal as a percent, you should multiply by 100 and add a percent sign.
For example:
- If you have the decimal 0.75, you would multiply 0.75 by 100 to get 75, and then add a percent sign to get 75%.
- If you have the fraction 3/4, you can convert it to a decimal (3 รท 4 = 0.75), then multiply by 100 to get 75%, and add the percent sign.
Therefore, the correct response is: Multiply by 100 and add a percent sign.