1. Find the amount of increase: - Subtract the original price from the new price: ₱15,000 - ₱10,000 = ₱5,0002. Divide the amount of increase by the original price: - ₱5,000 / ₱10,000 = 0.53. Multiply the result by 100 to express it as a percentage: - 0.5 x 100 = 50% Therefore, the percentage increase in the price of the smartphone is 50%.Step-by-step explanation:hope it helps!