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Evan's Tea Shop has caffeinated tea and decaffeinated tea. The tea shop served 9 caffeinated teas and 6 decaffeinated teas. What percentage of the teas served were caffeinated?

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Answer:

Step-by-step explanation:

  1. 9 + 6 = 15
  2. caffeinated/all types of teas = x/100 = [tex]\frac{9}{15} = \frac{x}{100}[/tex]  
  3. Cross multiply and divide to find the percentage: 9 × 100 = 900,         900 ÷ 15 = 60
  4. Put 60 as the numerator: 60/100
  5. Convert to percentage: 60%

You're done!

If you wanted to find the percentage of the decaffeinated teas, just subtract 60% from 100%, and you get 40%.

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