Here's how to convert Fahrenheit to Celsius:

Formula:

Celsius = (Fahrenheit - 32) x 5/9

Calculation:

1. Subtract 32 from the Fahrenheit temperature: 43 - 32 = 11

2. Multiply the result by 5/9: 11 x 5/9 = 6.11 (approximately)

Therefore, 43 degrees Fahrenheit is approximately 6.11 degrees Celsius.