Percent of Length

• 1). Measure the total length of a particular space or object in inches. Write this number as the denominator (bottom digit) of your fraction.
  
  
• 2). Measure part of the length of that same space or object in inches. Write this number down as the numerator (top digit) of a fraction.
  
  
• 3). Divide the numerator by the denominator to find a decimal representation of the length.
  
  
• 4). Move the decimal over two places to the right to find the percent of length in inches that the object or part of space takes up within the total amount.
  
  

Length Percent Change

• 1). Measure the length of an object in inches. Write the length down as the original length.
  
  
• 2). Measure the length of the same object after its undergone some change. Write the new length down.
  
  
• 3). Subtract the old length in inches from the new length in inches. Write the difference (change of length) as the numerator of your fraction. Write the old length as the denominator of your fraction.
  
  
• 4). Divide the numerator by the denominator to find a decimal. Move the decimal two places to the right to find the percent change from the original measurement to the current measurement to record growth or shrinkage percentage.