Proportion

Proportion

• Two quantities are in direct proportion when both quantities increase at the same rate
• Two quantities are in inverse proportion when one quantity increases at the same rate as the other quantity decreases

Divide or multiply

• You can use common sense to work out whether to divide or multiply in proportion questions
  • 6 people build a wall in 4 days
  • 6x4=24 so 1 person could build the wall in 24 days
  • 24/8=3 so 8 people could build the wall in 3 days

Examiners report

• Show your method by writing down what you are working out at each stage of your working
• Read the question carefully-you have to write down the option which offers better value
• You won’t get the final mark if you just circle or underline your choice