40% of teas served were caffeinated.
Step-by-step explanation:
Given,
Number of caffeinated tea served = 30
Number of decaffeinated tea served = 45
Total tea served = 30+45 = 75
Percent of caffeinated tea served = [tex]\frac{Number\ of\ caffeinated\ tea}{Total\ number\ of\ tea}*100[/tex]
Percent of caffeinated tea served = [tex]\frac{30}{75}*100[/tex]
Percent of caffeinated tea served = [tex]\frac{3000}{75}[/tex]
Percent of caffeinated tea served = 40%
40% of teas served were caffeinated.
Keywords: percentage, addition
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