Aptitude - Decimal Fraction - Discussion

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

2994/14.5=206.4 and 29.94/1.45=20.48

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

Any short methods ?

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.!