ratio

• Ratio


  A way of comparing two or more quantities
• Ratios


  • Ratio of purple sweets to green sweets is 3 to 5
  • Ratio of likes to dislikes on a YouTube video is 558 to 12
• Simplifying ratio


  1. Find the highest common factor of the numbers

  2. Divide both numbers by the highest common factor
• Simplifying ratios


  • 4 to 12 simplified to 1 to 3
  • 10 to 25 to 30 simplified to 2 to 5 to 6
  • 90 to 162 simplified to 5 to 9
• Ratio in the form 1 to N


  Simplify the ratio to make the first number 1 by dividing both numbers by the first number
• Ratios in the form 1 to N

  • 4 to 26 simplified to 1 to 6.5
  • 14 cm to 5.6 m simplified to 1 to 40
• Sharing in a ratio

  1. Add the numbers in the ratio to get the total

  2. Divide the total amount by the total parts in the ratio

  3. Multiply each part of the ratio by the result to get the individual amounts
• Sharing in a ratio

  • 30 pounds shared in ratio 3 to 2 is 18 to 12
  • 51 sweets shared in ratio 9 to 8 is 27 to 24
  • 45 shared in ratio 2 to 3 to 4 is 10 to 15 to 20
• Fraction


  The number of parts of something divided by the total number of parts
• Ratio


  Can be expressed as a fraction of the total
• Fractions from ratios


  • 3/5 of work done
  • 9/20 of members are women
  • 5/11 of fruit is apples