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It was reported that about 80% of airline tickets-nearly $65 billion worth last year are issued over the internet. What were the total sales of airline tickets last year? Round to the nearest billion

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Answer:

The answer is nearly $81 billion.

Step-by-step explanation:

  • If we know that 80% of airline tickets worth $65 billion, then [tex]65=80\%\plus{Total_{tickets}}=0.8\plus{Total_{tickets}}\\[/tex].
  • Then,to know how much billion dollars worth the total tickets, we just have to clear out [tex]Total_{tickets}[/tex] of the equation, by dividing both sides by 0.8, which yields [tex]\frac{65}{0.8}=Total_{tickets}=81.25[/tex]

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