Question

• You have 100kg of potatoes
• Each potato is 99% water, by weight
• You run each potato through a dehydrator, reducing each potato's water content to 98%
• How much do your potatoes weigh now?

• Each potato is 99g water, 1g other stuff -- {$99:1$}
• In order to make each potato 98% water, we need the ratio to be {$98:2$}
• {$98:2 = 49:1$}
• Because we can't add any more non-water stuff, we need to reduce the water content by {$\frac{49}{99}$}