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2010 AMC 12B Problem 1

Problem 1 of 25EasierAlgebra

Makayla attended two meetings during her 99-hour work day. The first meeting took 4545 minutes and the second meeting took twice as long. What percent of her work day was spent attending meetings?

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Solution

The two meetings lasted 45+90=13545+90=135 minutes, and the work day is 9⋅60=5409\cdot60=540 minutes. The fraction of the day spent in meetings is 135540=14=25%. \frac{135}{540}=\frac14=25\%. Thus, the correct answer is C.

More practice

Concepts: percentage · unit conversion

Problem text and solution from the LIVE past-contest archive. See also the AoPS wiki page for community solutions.