100 -> 80 is a 20% decrease ((80-100)/100). 80 -> 100 is a 25% increase ((100-80... | Hacker News

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bkberry352 on March 16, 2020 | parent | context | favorite | on: Dow Falls 2997 points worst drop since 1987 crash

100 -> 80 is a 20% decrease ((80-100)/100). 80 -> 100 is a 25% increase ((100-80)/80).

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