We will find the number of packed breakfast Mr. Jenkins ordered for the whole week as follows:

So, the total of the packed breakfast he had ordered was 600.
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We determine this as follows:
*We are given that 360 packed breakfast represented the 60% [Since he used 40% during the days stated and thus the remaining packed breakfast represented 60%]. So we use this number to find the 100%:
*We multiply the number we know (360) times the percentage that we want to know (100%) and divide by the percentage that the number we know represents (60%). The solution then is the number that 100% represents.