The first step is to subtract the number 32 from the number of degrees Fahrenheit. 83 minus 32 equals 51.
The resulting value from step one should be multiplied by the fraction five-ninths. Five-ninths is equal to the repeating decimal 0.5555. 51 times 0.5555 equals 28.3.
The final step is to place the correct unit behind the resulting number. 83 degrees Fahrenheit equals 28.3 degrees Celsius.