Ratio and proportion

• Ratio 


  is the comparison between two or more numbers or quantities
• If the ratio is 16:20 what is the fraction version?

  16/20
• Proportion


  is a statement that tells that two given ratios are equal.
• Extremes


  are the outermost terms in a proportion
• Means


  are the innermost terms in a proportion
• Are 12:16 = 15:24 equal?

  no