A price of ₱800 is increased by 10% and then the new price is decreased by 10%. What is the final price?
Correct answer: A. ₱792.0000000000001
After a 10% increase: ₱800 × 1.10 = ₱880. After a 10% decrease: ₱880 × 0.90 = ₱792. The final price is ₱8 lower, not back to ₱800, because the second 10% is taken from a bigger amount.
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