2 answers:
Answer:
413.03
Step-by-step explanation:
405 increased by 8.3 is 405+8.3.

Answer:
413.3 if ADD, 437.5215 if add by percent
Step-by-step explanation:
If it's increaced by 8.3%, then it is 405 + 32.5215 = 437.5215
If it's add 8.3, then it's 413.3.
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