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**Subject**: **Is 70ms 14 or 12% faster than 80ms ?**
**From**: Albert Chan <albertmcchan@...>
**Date**: Tue, 15 May 2018 07:19:34 -0400

Is 70ms 14 or 12% faster than 80ms ?
Reading many stackoverflow response, I am still confused.
Most answers claimed (1 - 70/80), or 12.5% faster
If the math is right, it is impossible to be 100% faster.
10 times faster (1000%) is meaningless (time is negative)
I normally avoid using "percentage faster", and prefer ratio:
Speed at 80/70 = 1.14X
--
https://stackoverflow.com/questions/31506554/is-70-ms-14-or-12-faster-than-80-ms?noredirect=1&lq=1
https://stackoverflow.com/questions/8127862/how-do-you-calculate-how-much-faster-time-x-is-from-time-y-in-terms-of
https://math.stackexchange.com/questions/716767/how-to-calculate-the-percentage-of-increase-decrease-with-negative-numbers/716770#716770