You're asking to convert 23 degrees Fahrenheit to Celsius. Here's how to do that:

Formula:

°C = (°F - 32) × 5/9

Calculation:

1. Subtract 32 from the Fahrenheit temperature: 23 - 32 = -9

2. Multiply the result by 5/9: -9 × 5/9 = -5

Therefore, 23 degrees Fahrenheit is equal to -5 degrees Celsius.