Final answer:
To calculate the percentage loss, subtract the selling price from the original price, calculate the difference, and then divide the difference by the original price. Multiply the result by 100 to get the percentage loss.
Step-by-step explanation:
To calculate the percentage loss, we first need to find the difference between the original price and the selling price. In this case, the difference is $120 - $90 = $30.
Next, we need to calculate the percentage loss by dividing the difference by the original price and multiplying by 100. So, the percentage loss is (30/120) * 100 = 25%.
Therefore, Cecil experienced a 25% loss on the camera.