Final answer:
To calculate the selling price of Diego's bicycle, multiply the original cost by the depreciation rate and subtract that amount from the original cost.
Step-by-step explanation:
Depreciation is the decrease in value of an asset over time. To calculate the selling price of Diego's bicycle, we multiply the original cost of the bicycle ($150) by the depreciation rate (15%) and subtract that amount from the original cost.
First, calculate the depreciation amount: $150 x 15% = $22.50
Next, subtract the depreciation amount from the original cost: $150 - $22.50 = $127.50
Therefore, Diego should sell his bicycle for $127.50.