The table below displays 2014 annual salaries of 500 registered nurses.

a. Find the approximate percentile rank of any salary between $55,000 and 59,999.
b. Find the approximate percentile rank of any salary between $75,000 and $79,999.

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Cumulative Salary $90,000 – 94,999 $85,000 – 89,999 500 3 18 497 $80,000 – 84,999 26 479 $75,000 – 79,999 57 453 $70,000 – 74,999 85 396 $65,000 – 69,999 148 311 $60,000 – 64,999 130 163 $55,000 – 59,999 $50,000 – 54,999 21 33 12 12