10% D.A. for Central Staff is possible if price is maintained in this level.

The all India consumer price index for Industrial Workers has been raised by 3 points in January 2010 and stood at 172 points [Source: Labour Bureau, Govt. of India]. It was 169 in December 2009. The D.A due for Central Govt. Employees will also raise to 37% as on 01.02.2010. Hence it is presumed that, the DA due w.e.f. 01.07.2010 would be more than 45% in case the present trend continues and Government is not take any action for reducing the price raise.
02/09: 148
03/09: 148
04/09: 150
05/09: 151
06/09: 153
07/09: 160
08/09: 162
09/09: 163
10/09: 165
11/09: 168
12/09: 169
01/10: 172
Total: 1909 and Tweleve monthly average = 1909/12= 159.08
DA Calculation: 159.08 (-) 115.76 = 43.32 X 100/115.76 = 37.42

In case the price index continue to stay at 172 points from 02/2010 to 06/2010, then the DA payable from 01.07.2010 will be 45% as detailed below:
07/09: 160
08/09: 162
09/09: 163
10/09: 165
11/09: 168
12/09: 169
01/10: 172
02/10: 172 [Assumed]
03/10: 172 [Assumed]
04/10: 172 [Assumed]
05/10: 172 [Assumed]
06/10: 172 [Assumed]
Total: 2019 [If current level is maintained]
Twelve monthly Average is: 2019/12 = 168.25
DA Calculation:
168.25 (-) 115.76 = 52.49 X 100/115.76 = 45.34 %