Question

A student measured the mass of a rock to be 19.8 grams; the actual mass was 18.6 grams. What was the student's percent deviation?

Answer 1

The formula for percent deviation is

percent deviation = (measured - actual) ÷ actual × 100

Thus, 

Percent deviation = (19.8 g - 18.6 g)  ÷ 18.6 g × 100
Percent deviation = 6.45%

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