Volunteers at a teenage distress center have been assigned based on their skills and expertise. It's assumed that 40% are drug related, 25% *** related, 25% stress, and 10% education. For the study sample of 120 calls per month were categoruzed as follows

Observed frequencies: Drug (52) *** (38) Stress (21) Education (9) Total 120.

Apply chi-squared goodness of fit to test the hypothesis of assumed distribution of calls. Interpet results for the purposes of staff allocation at the distress center.

I know how to calculate chi squared but the percentages for each category confuse me!