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

°F = (°C × 9/5) + 32

Here are the steps to convert a Celsius temperature to Fahrenheit:

1. Multiply the Celsius temperature by 9/5. This step converts the Celsius temperature to degrees Kelvin.

2. Add 32 to the result. This step converts the temperature to degrees Fahrenheit.

For example, to convert 20 degrees Celsius to Fahrenheit:

°F = (20 °C × 9/5) + 32

°F = (36) + 32

°F = 68

Therefore, 20 degrees Celsius is equal to 68 degrees Fahrenheit.