a 100 vs 100 - English Language Usage Stack Exchange The flow rate increases 100-fold (one hundred-fold) Would be a more idiomatic way of saying this, however, the questioner asks specifically about the original phrasing The above Ngram search would suggest that a one hundred has always been less frequently used in written language and as such should probably be avoided Your other suggestion of by one hundred times is definitely better than a
The meaning of 0% and 100% as opposed to other percentages? If soap A kills 100% and soap B kills 99 99% of bacteria, the remaining amount of bacteria after applying A (0%) is infinitely smaller than the remaining amount of bacteria after applying B (0 01%) Therefore A is much, much better You can see from these examples that 0 01% gap behaves differently across the percentage scale
Why is a 100% increase the same amount as a two-fold increase? Yes, the correct usage is that 100% increase is the same as a two-fold increase The reason is that when using percentages we are referring to the difference between the final amount and the initial amount as a fraction (or percent) of the original amount
Is it proper to state percentages greater than 100%? People often say that percentages greater than 100 make no sense because you can't have more than all of something This is simply silly and mathematically ignorant A percentage is just a ratio between two numbers There are many situations where it is perfectly reasonable for the numerator of a fraction to be greater than the denominator
phrase usage - Is 100% correct pronunciation an understandable . . . ‘100% correct’ is grammatically correct in this context, though the organization of the sentence is a bit atypical for many more formal dialects of English and may be difficult for some people to understand without having to think a bit (I would instead restructure things as suggested at the end of Astralbee’s answer as that resolves both
centennial vs. centurial - describing periods of 100 years relating to 100 years : marking or beginning a century, with the example "the centurial years 1600 and 1700" But there is a word that is widely used to indicate the range of years or centuries covered by an article or book: history
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