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Current time:0:00Total duration:2:31

Solving unit rate problem

CCSS.Math:

Video transcript

Jayda takes three hours to deliver 189 newspapers on her paper route what is the rate per hour the rate per hour which she delivers the newspaper so this first sentence tells us that she delivers or she takes three hours three hours to deliver to deliver 189 newspapers so you have three hours for every 189 newspapers newspapers that's what the first sentence told us but we want to figure out the rate per hour or the newspapers per hour so we can really just flip this rate right here so if we were to just flip it we would have 189 newspapers newspapers for every for every three hours for every three hours which is really the same information we're just flipping what's in the numerator and what's in the denominator now we want to write it in as simple as possible form and let's see if this top number is divisible by 3 1 plus 8 is 9 plus 9 is 18 so that is divisible by 3 so let's divide this numerator and this denominator by 3 to simplify things so if you divide 189 by 3 let's do it over the side over on the side right here 3 goes into 189 3 goes into 18 6 times 6 times 3 is 18 subtract bring down the 9 18 minus 18 was nothing 3 goes into 9 exactly 3 times 3 times 3 is 9 no remainder so if you divide 189 by 3 you get 63 and if you divide 3 by 3 you're going to get 1 you have to divide both the numerator and the denominator by the same number so now we have 63 newspapers for every one hour or we can write this as 63 over 1 newspapers per hour so we could write this as 63 over 1 news papers per hour for one hour or we can write this as 63 because 63 over 1 is the same thing as 6363 newspapers newspapers per hour