To convert degrees Fahrenheit (°F) to degrees Celsius (°C), you can use the following formula:

°C = (°F - 32) × 5/9

In this case, to convert 87 degrees Fahrenheit to Celsius:

°C = (87 - 32) × 5/9

°C = (55) × 5/9

°C = 30.56

Therefore, 87 degrees Fahrenheit is equal to approximately 30.56 degrees Celsius.