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Mr. Flores, a second-grade teacher, measures students' oral reading fluency three times a year. At midyear, he assesses Sienna, a new student to his class.

Mr. Flores, a second-grade teacher, measures students' oral reading fluency three times a year. At midyear, he assesses Sienna, a new student to his class. In a one-minute timed reading, Sienna reads 40 words and makes 4 errors.

Based on this data and 2017 ORF Norms Download 2017 ORF Norms, what is Sienna's accuracy rate and percentile rank?

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