write each ratio as a fraction in simplest fraction
anna and julie each take a bicycle ride . anna rides 20 miles in 1/3 hours . julie rides 246 miles in 16 hours which rider has the slower unit rate ? by how much ?
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So i'm not sure what they mean by simplest fraction, but i used 20miles/(1/3h)=480mi/8h for Anna's rate and, and 246miles/16h=123mi/8h for Julie's rate
(since that seemed more simplified than fractions over fractions, didn't involve decimals, and had the same denominator).
From there i saw that Julie's rate was slower and subtracted her rate, from Anna's rate:
480mi/8h - 123/8h = 357mi/8h
so Julie ride 357mi/8h slower than Anna, (which is about 44.6miles/h when you divide).