Mr = 7 units and Mrs = 2 units. Mr’s 7 units are $1400, so 1 unit = $200. To be equal, each must hold half of the total amount.

Mr$200$200$200$200$200$200$200Mrs$200$200give 2.5 unitsMr = $1400

Plain numbers are given; italic underlined numbers are worked out.

  1. Mr has 7 units → $1400, so 1 unit → $1400 ÷ 7 = $200
  2. Mrs → 2 units = $400; total = $1400 + $400 = $1800
  3. Equal share → $1800 ÷ 2 = $900 each
  4. Mr gives → $1400 − $900 = $500

Mr Anderson must give Mrs Anderson $500.

Check: Mr $1400−$500=$900; Mrs $400+$500=$900. ✓