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It takes Sian 9 days to read a 432 page book.  How long will it take her to read a 720 page book at the same rate?

i need help

 Mar 5, 2021
 #1
avatar+236 
+2

432/9 = 48

720/48 = 15

15 days

 Mar 5, 2021
 #2
avatar+149 
+1

Let x number of  how many time it take to read.

\(\frac{9}{432}=\frac{x}{720}\)

\(48x=720\)

\(x=15\)

 Mar 5, 2021
 #3
avatar+34465 
+2

9 days / 432 pages    *   720 pages   =  15 days 

                      ( see how the 'pages' cancel' out .....and you are left with 'days' as units?)

 Mar 5, 2021

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