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Last year, on the television programme Antiques Roadshow, a painting was said to be worth £15,000 although the painting originally cost only 50p. As a percentage of the original price, what would be the approximate profit if the painting were to be sold for £15,000?

If you liked this problem, here is an NRICH task which challenges you to use similar mathematical ideas.

*This problem is taken from the UKMT Mathematical Challenges.*

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