9) D

The highest number of cases comes from organisation 3. The number of cases = 26
Total no. of cases = 1+26+4+3+2+3+1+12+5+12 = 69 cases ≈ 70 cases
Percentage = (26/70) x 100 = (13/35) x 100 = (13/7) x 20 ≈ (14/7) x 20 = 40%
We rounded 13 up to 14. Since we rounded up, we need to round 40% down to 38%.
Hence the answer is D

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