Jenny had $24 left after spending 3/7 of her money. How much is half of her original amount of money? Let's think first. Chain of thought:
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Jenny spent 1 - 3 / 7 = 4 / 7 of her money. Since 4 / 7 is equal to $24, then 1 / 7 is equal to $24 / 4 = $6. So, Jenny originally had $6 x 7 = $42. Therefore, half of her original amount of money is $42 / 2 = $21.
Therefore, the answer is 21.
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