안녕하세요,
최근 영문을 읽다가 "reduce A by more than two orders of magnitude"라는 표현을 보았어요. 네이버에서 찾아보니, 아래의 설명이 나오는 데 읽어봐도 이해가 안 됩니다. 100배 감소했다는 말을 이렇게 하는 것인지요? %로 쓰지 않는 이유가 무엇인지, by a factor of X라는 표현과는 어떻게 다른 것인 혹시 알고 계시는 분이 있을까요?
도움 감사드립니다.
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An order of magnitude is the class of scale or magnitude of any amount, where each class contains values of a fixed ratio to the class preceding it. The ratio most commonly used is 10.
In
wordsDecimalPower
of tenOrder of
magnitudeten thousandth0.000110-4−4thousandth0.00110-3−3hundredth0.0110-2−2tenth0.110-1−1one11000ten101011hundred10010²2thousand1,00010³3ten thousand10,0001044million1,000,0001066billion1,000,000,0001099
Orders of magnitude are generally used to make very approximate comparisons. If two numbers differ by one order of magnitude, one is about ten times larger than the other. If they differ by two orders of magnitude, they differ by a factor of about 100.
the order of magnitude of a number can be defined in terms of the common logarithm, usually as the integer part of the logarithm, obtained by truncation.