Company Price of your Car: X
F.E.D: 2.5%
G.S.T: 17%
Total Control Price of your Car: 693,000 (Suzuki Alto)
Thus,
X+0.025X+0.17X = 693,000
1.195X = 693,000
X = 693,000/1.195
X = 579,916
Since F.E.D has been removed and G.S.T has been reduced to 16% in a new budget (effective 1st july 2011), new control price of your car will be:
Company price * 16% G.S.T
Similarly, in the case of Alto as in example above the new control price will be:
X * 1.16 = 672,703