Pies = 1 unit, cakes = 3 units. The 50 more cakes is the gap of 2 units.

Pies1Cakes11150 more = 2 units

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

  1. Cakes − Pies = 2 units → 50
  2. 1 unit → 50 ÷ 2 = 25 (pies)
  3. Cakes = 3 units → 3 × 25 = 75

He made 75 cakes.

Check: 75 − 25 = 50 more, and 75 = 3 × 25. ✓