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# Aptitude - Decimal Fraction - Discussion

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"The secret to creativity is knowing how to hide your sources."
- Albert Einstein
5.

If 2994 ÷ 14.5 = 172, then 29.94 ÷ 1.45 = ?

 [A]. 0.172 [B]. 1.72 [C]. 17.2 [D]. 172

Explanation:

 29.94 = 299.4 1.45 14.5

 = 2994 x 1 [ Here, Substitute 172 in the place of 2994/14.5 ] 14.5 10

 = 172 10

= 17.2

 Sundar said: (Thu, Sep 8, 2011 11:09:05 AM) If 2994/14.5 = 172 then 29.94/1.45 = ? We can write 29.94/1.45 as 2994/145 (by mul with 10 both numerator and denominator). Then, 2994/145 can be written as 2994/(14.5 x 10) or (2994/14.5)x(1/10)------(A) Given that 2994/14.5 = 172. So replace 2994/14.5 with 172 in (A) 172 x (1/10) = 17.2 Hope this will help you. Have a nice day.!

 Suzan said: (Wed, Sep 28, 2011 09:14:54 PM) Any short methods ?

 Deepa said: (Sun, Dec 4, 2011 07:09:49 PM) Hey this sum is very simple. I will explain you .first 29.94/1.45 is multiplied and divide with 10 then you will get 299.4/14.5 .then again multiply and divide 299.4/14.5 with 10 then very important you are going to multiply only the numerator with 10 because then only you wil get (2994/14.5*1/10).then substitute d value of 2994/14.5=172. The next step is 172/10 then the ans is 17.2, I hope that you can understand

 Teja said: (Thu, Feb 16, 2012 02:48:50 PM) 2994/14.5=206.4 and 29.94/1.45=20.48

 Sona said: (Sun, Mar 25, 2012 02:35:06 AM) Deepa why you divide and multiply with 10 one by one? why don't you directly divide 29.94 with 100 to make it 2994. Look if it is like this as under then why it is wrong? 2994/14.5*1/100 as 2994/14.5=172 so = 172*1/100 =1.72

 Deepa said: (Sun, Apr 29, 2012 09:49:56 PM) @Teja. What you are telling is rite acctualy. But the problem is, if 2994/14. 5=172, according 2 maths subject if means given condition. Using the given conditions only we have to find the solutions.

 Deepa said: (Sun, Apr 29, 2012 10:25:00 PM) @Sona you can divide directly but we have no use out of it, you can find the mistakes in the following steps . Look you have made 1 mistake in the 2 step,ie., 2994/14.5 is wrong( you have understood the question wrongly) 2994/1.45 is given in the question.(we want 2994/14.5 so i have multiplied & divided with 10 in the next next step. i wil work for you 29.94/1.45*10/10=299.4/14.5, 299.4/14.5*10/10=(2994/14.5)*1/10(multiplied Nr with 10) 2994/14.5=172.,172*1/10=17.2 hope you can understand.:-

 Kalai said: (Fri, May 4, 2012 11:07:34 AM) If 2994/14.5=172 means 2994/ 145=1720 Then 29.94/1.45=1720[assume 2 decimal place] means 17.2