It is given in the question that,Rebecca wants to put 544 pennies in a coin collection book. the blue book fits 9 pennies per page. the red book fits 7 pennies per page.
If she uses all the red books, then number of pennies required
[tex] \frac{544}{7} = 77.7 [/tex]
If she uses all the blue books, then the number of pennies required
[tex] \frac{544}{9} = 60.4 [/tex]
Number of morepages required on using the red book is
[tex] 77.7-60.4 = 17.3 [/tex]
