Neither of those seems right. A ratio is usually expressed in the form " x to y " or " x : y " (where x and y are numbers), or sometimes as a decimal fraction, but not normally as a percentage. In the second case, you cannot have a percentage of one thing "to" another.
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| Native Speaker living in Japan | 93,500 |
| The Japanese population | 127,600,000 |
| percentage | 0.073% |
AnonymousOne way you could rewrite the sentence is:"The percentage of native English speakers living in Japan, out of the total Japanese population, is 0.073%.""The percentage of native English speakers living in Japan" seems to me to be referring to the proportion of native English speakers who live in Japan relative to total number of native English speaker