# Math

A share of stock worth 100 dollars loses 90% of its value. Then, over the next year, the value of the stock increases by 90%. What is the new value of the stock?

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### Answers

The new value of the stock is 99 dollars. This is because the stock originally started off at 100 dollars. After losing 90% of its value, the stock would only be worth 10 dollars. When the value then increases by 90%, the value of the stock becomes 99 dollars (10 dollars plus 90% of 10 dollars = 99 dollars).