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How potatoes can lose half their weight by drying out just 1%

Ellsworth Toohey
Dec 13, 2025
∙ Paid

New Africa/shutterstock.com...

Here’s a fun math problem for a Saturday afternoon: You’ve got 100 kg of potatoes that are 99% water. You leave them out overnight and they dry slightly, becoming 98% water. How much do they weigh now?

If you guessed somewhere around 99 kg, congratulations — you’re wrong. The answer is 50 kg. The potatoes lost half their wei…

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