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rocksamantha5
I think the answer would be 48. Because if you divide 60 by 5. Then you get 12. and that would be 1/5 of it. so then you subtract that from 60 
Sofiadecredico
60 windows and 1/5 ARE being replaces.  lets start out by finding out how many window are being replaces.

60/5=12

12 of the windows are being replaces

now subtract that from 60 and you will have your answer

60-12=48

48 windows are now being replaced