Flour : Sugar
9u : 2u
1.62kg : 0.36kg <-- see ** below how to get this.
11u --> 1.98kg
1u --> 1.98 / 11 = 0.18kg
**
9 x 0.18 = 1.62 kg
2 x 0.18 = 0.36 kg
(a) 6 x 0.36 = 2.16 (kg)
1.98 + 0.78 = 2.76 (kg)
Eggs --> 2.76 - 2.16 - 0.36 = 0.24 (kg)
(b) Flour : Sugar : Eggs --> 216 : 36 : 24 = 18 : 3 : 2
