A scientist collects 120 samples of worms from a field. If 35 of them are annelids, what percentage of the samples are annelids?
Answer
29.17%
The correct answer is 29.17% — Round to two decimal places = 29.17%.
Step-by-step solution
- Identify total number of samples = 120.
- Identify number of annelids = 35.
- Calculate percentage = (35/120) × 100.
- Compute 35 ÷ 120 = 0.291666… and × 100 = 29.1666…%.
- Round to two decimal places = 29.17%.
Common mistake: Not converting the ratio to a percentage
Concept tested: Percentage of organisms in a sample
Published · How this solution was prepared and checked
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