Answer:
Total no. of teas served: 20
Therefore, we can write the two quantities as fractions of twenty:
14/20 and 6/20
A percentage is "per-cent", i.e. per 100, therefore a fraction of 100. To make this denominator a fraction of 100 we multiply it by 5 (20 x 5 = 100), and because what we do to the bottom of the fraction we must do to the top, we multiply each numerator by 5:
14/20; 14 x 5 = 70
6/20; 6 x 5 = 30
So,
70/100, 30/100
Answer: 70% of the teas sold were caffeinated.
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