4 years ago

a 15% tip to represents the ratio $0.15 to 100 cents. why does this make 15 percent a unitless Factor

1 answer:

8 0

We don't assume that 15% is 15% of some number of cents - it's just 15/100. In the given example, we have 15 cents divided by 100 cents. We can remove the cents from both the numerator and the denominator to get 15/100, which has no units.

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