{
  "version": 1,
  "kind": "barmodel",
  "title": "Two fifths of a bag of 40 sweets are eaten",
  "description": "A fraction of an amount: a bar of five equal units, two of them eaten, the whole bag of 40 braced over the bar and one unit's worth braced under it.",
  "bars": [
    {"id": "bag", "text": "Bag", "parts": [
      {"id": "eaten", "units": 2, "text": "eaten", "role": "emphasis"},
      {"units": 3, "text": "left"}
    ]}
  ],
  "braces": [
    {"over": ["bag"], "amount": 40, "text": "40 sweets"},
    {"over": ["eaten"], "amount": 16, "text": "eaten: ?"}
  ]
}