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Kenneth S. answered • 01/11/17
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Expert Help in Algebra/Trig/(Pre)calculus to Guarantee Success in 2018
Poor question! 21/28 = 3/4, a reduced fraction, but this isn't a UNIT RATE since there are no units in the problem (such as 21 miles driven in 28 minutes)
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Hayley C.
01/11/17