Which of the following represents the process to find a percentage increase?

The process to find a percentage increase involves taking the original number and adding the calculated increase to it. The correct procedure is captured in the first choice, where you start with the original number and then calculate the increase by multiplying the original number by the percentage expressed as a decimal. This calculated amount is then added to the original number to get the new value after the increase.

In mathematical terms, if you have an original number and want to find a percentage increase of a given percent, you first convert the percent to decimal by dividing by 100. Then, you multiply that decimal by the original number to determine the amount of the increase. Finally, you add this increase back to the original number, leading to the formula outlined in that option.

This method accurately reflects how a percentage increase is applied in real-world scenarios, such as when calculating sales tax, inflation adjustments, or salary increases.