Pass maths · Ratio and proportion

Finding missing amounts

Learn the method, then complete five focused questions.

Progress…

LZ Method

Find the scale factor between corresponding quantities, or work out one unit. Apply the same scale factor to both quantities.

  1. 13 notebooks cost £6
  2. 21 costs £6 ÷ 3 = £2
  3. 35 cost 5 × £2 = £10