IGCSE Mathematics Core C1.11.1 Understand and use ratio and proportion to: • give ratios in their Question Bank

• Understand and use ratio and proportion to: • give ratios in their simplest form • divide a quantity in a given ratio • use proportional reasoning and ratios in context. e.g. 20: 30: 40 in its simplest form is 2: 3: 4. e.g. adapt recipes; use map scales; determine best value.