The state university reported 1183 cases of flu in their student body for the month of January. If this was a 350% increase above the number of flu cases in the month of December, how many students had flu in December?

Let us assume the number of students having flu in December = x

Number of students having flu in the month of January = 1183

Percentage increase in the number of people having flu from the month of December to the month of January = 350%

Then we can write the equation as

350x/100 = 1183

350x = 1183 * 100

350x = 118300

x = 118300/350

= 11830/35

= 338

So the number of students that were affected by flu in the month of December was 338. This is the easiest way to get to the required answer.