Final answer:
To find the percentage gain, subtract the buying price from the selling price. Divide the difference by the buying price. Multiply the result by 100 to get the percentage gain.
Step-by-step explanation:
To find the percentage gain, we need to determine the difference between the selling price and the buying price, and then divide it by the buying price. In this case, the difference is 6500 cedis - 5500 cedis = 1000 cedis. Dividing this by the buying price of 5500 cedis gives us a decimal value of 0.1818.
To convert this to a percentage, we multiply the decimal value by 100, which gives us 18.18%. Therefore, the percentage gain is 18.18%.