A student computes a percent increase of a fraction, what must they do first?

To compute a percent increase of a fraction, the first step is to determine the amount of increase, which involves finding the difference between the new fraction and the original fraction. This is represented by subtracting the original fraction from the new fraction. By doing this, the student calculates how much the fraction has increased.

Once this difference is obtained, the student can then proceed to find the percent increase by dividing the increase by the original fraction and multiplying by 100 to convert it into a percentage. It's essential to start with this subtraction process to accurately find the increase before calculating the percentage.