The vehicles are 8 equal units. Three units are not cars, so the other 5 units are cars = 30.

Vehicles66666666cars 30 = 5 units

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

  1. Cars = 5 units → 30
  2. 1 unit → 30 ÷ 5 = 6
  3. Total = 8 units → 8 × 6 = 48

There are 48 vehicles in the parking area.

Check: not cars = 3 × 6 = 18; 18 + 30 = 48. ✓