# Thread: Triple = up 200%

1. ## Triple = up 200%

Dear teachers

In the sentence "GDP per capita has tripled over the past decade", if the GDP per capital started with \$100 ten years ago, so after tripling, should it be \$300, that is, up 200% (\$100 x 300% = \$300, up 200%)?

Regards

Anthony the learner

2. ## Re: Triple = up 200%

Yes, triple is "times three." This is more of a math question than a language question. Yes, if something is three times what it once was, it is what it was plus two times that.

3. ## Re: Triple = up 200%

Originally Posted by patran
Dear teachers

In the sentence "GDP per capita has tripled over the past decade", if the GDP per capital started with \$100 ten years ago, so after tripling, should it be \$300, that is, up 200% (\$100 x 300% = \$300, up BY 200%)?

Regards

Anthony the learner
A 'by' would make the meaning clearer. Advertisers, keen to emphasize the favours they are doing to an unworthy world, tend to omit it.

b

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