From Celsius to Fahrenheit

• 1). Write the boiling points of water for both scales in a T chart.
  
  C | F
  
  ---------------------
  
  100 | 212 Boiling Point of Water
  
  
• 2). Write the freezing point of water in the next row of the T chart.
  
  C | F
  
  ---------------------
  
  100 | 212 Boiling Point of Water
  
  0 | 32 Freezing Point of Water
  
  
• 3). Subtract the difference of the boiling point of water minus the freezing point of water. Subtract Celsius minus Celsius and Fahrenheit minus Fahrenheit. Write your answer on the third row of the T chart.
  
  C | F
  
  ---------------------
  
  100 | 212 Boiling Point of Water
  
  0 | 32 Freezing Point of Water
  
  100 | 180 Differences in degrees
  
  
• 4). Divide the temperature by the difference in degrees, and set them equal to each other. This is the data from the T chart: C / 100 = F / 180.
  
  
• 5). Multiply both sides by 10 and simplify the fractions: (C * 10) / 100 = (F * 10) / 180. After simplifying, then C / 10 = F / 18.
  
  
• 6). Replace the appropriate degrees in your equality to find the difference. For example, if you want to find what the difference is in degrees for 20 Celsius, you write: C / 10 = F / 18. With C = 20, then 20 / 10 = F / 18. After completing the operations, F = 36. Thus, a difference of 20 Celsius is equal to a difference of 36 Fahrenheit. For 72 Fahrenheit, the equation is the same: C / 10 = F /18. Substituting F = 72 into the problem, the equation becomes C / 10 = 72 / 18. After the operations, it is discovered that C = 40. Therefore, a difference of 72 degrees Fahrenheit is equal to a difference of 40 Celsius.