Answer :
21%
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Calculate the difference in price and then find what percentage this difference is of the original price.
First, we subtract the original price from the new price to find the increase:
- £419.87 - £347 = £72.87
Next, we divide this increase by the original price:
- £72.87 / £347 = 0.21
Then, we multiply the result by 100 to get the percentage:
- 0.21 × 100% = 21%
Therefore, the percentage increase in the price of the chair is 21%.