Quote:
Originally Posted by rankin0bass
200% is a 4x reduction in time.

Take 1 as the base rate.
If we start from 15, and decrease it at the rate of 1 per minute, it will take 15 minutes.
If we have +100% the rate, then it is decreasing at a rate of 2 per minute. (2 is 1 higher than 1, so it is a 100% increase over 1. )
If we start from 15, and decrease it at the rate of 2 per minute, it will take 7.5 minutes.
If we have +200% the rate, then it is decreasing at a rate of 3 per minute. (3 is 2 higher than 1, so it is a 200% increase over 1.)
If we start from 15, and decrease it at the rate of 3 per minute, it will take 5 minutes.