Aptitude - Decimal Fraction - Discussion

Hai, here is simple method.

100 should be multiplied with 29.94 to become - 2994.

10 should be multiplied with 1.45 to become - 14.5.

Hence (29.94/1.45)*(100/10) = 2994/14.5.

We know that 2994/14.5 = 172.

So (29.94/1.45)*(100/10) = 172.

When we transfer (100/10) to right side it becomes (10/100).

So (29.94/1.12) = 172 (10/100).

i.e, (29.94/1.12) = 172 (1/10).

i.e, (29.94/1.12) = 172/10.

i.e, (29.94/1.12) = 17.2.

Hey I can not understand how answer is 17.2?

@Deepa.

Your explanation simple and good.

@Vikas.

Because its already mentioned in the question that 2994/14.5 = 172.

After calculations when we get this value. We substitute it to 172.

Hey, my calculator says 2994/14.5 = 206.4827586206897.

How you people substitute it with 172? please tell me.

Can any one tell the rules of shifting of decimals during division and multiplication?

i.e. in case of division total decimals of both terms are added or subtracted?

Friends I'm unable to understand how 2994/14.5 = 172.

Please help.

If 2994/14.5=172 means 2994/ 145=1720
Then 29.94/1.45=1720[assume 2 decimal place] means 17.2

@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.:-

@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.