Question

What is the difference between
5 4
11--- and 21--- ?
21 51

Answer 1

give me the easiest solution please

Answer 2

First one, keep 21 at bottom.
Multiply 21 by 11; add answer to 5. Put that total on top.

Answer 3

5 236
11----- = -------
21 21

4 1075
21------ = -------
51 51

Answer 4

\[ 1171 \over 119\]

Answer 5

\[21=3\times 7\]
\[51=3\times 17\]
\[\frac{5}{21}=\frac{5}{21}\times \frac{17}{17}=\frac{85}{357}\]
\[\frac{4}{51}=\frac{4}{51}\times \frac{7}{7}=\frac{28}{357}\]
\[\frac{85}{357}+\frac{28}{357}=\frac{113}{357}\] and \[11+21=32\]
answer is
\[32\tfrac{113}{357}\]

Answer 6

Difference is

236 1075
------ - ------- (LCM of 21 and 51 is 357)
21 51

4012 - 7525 - 3513 - 1171
-------------- = ---------- = ---------
357 357 119

Answer 7

@satellite

we have to find the difference and not the sum !!! :)

Answer 8

the answer is 100
-9 ---
119
can this have an easier solution because this should be answered in just one minute with no calculators but it is multiple choice

Answer 9

holy moly i added! sorry. it says "difference"

Answer 10

i already know how to do it but i want an easier or shortcut but if it is not possible it is ok

Answer 11

no shortcut at all because the answer is negative. gotta write out all the steps harkirat sent.

Answer 12

ohh ok

Answer 13

easier method cud b this

just multiply the first fraction one by 51/51 and second fraction one by 21/21
then subtract the resulting fractions and reduce the answer to lowest form

Answer 14

what?

Answer 15

12036 - 22575 - 10539 - 1171 100
-------------- = --------- = ------- = - 9 -------
21 x 51 1071 119 119

Answer 16

clear now???

This will save the time taken to find the LCM....

Answer 17

ohhh ok Maybe it is just a big number so i find it hard.
I will just be practicing to be fast in doing this kind of fractions.
I hope to be better in math now because i am loving it already and math is really an important subject.
Thanks! :)

Answer 18

Hi......The fractions are very small..If you need a practical answer then just find the difference between the integers(21-11=10) ;)

Answer 19

what do you mean?

Answer 20

for doing fractions quickly you should be thorough with
finding LCM
know your division rules for 2,3,4,5,6,7,8,9,10,11 etc.

Answer 21

what?

Answer 22

i am not that good at fractions because the teacher who taught me about fraction is hard to understand and i just understood it by my self as time goes by.

Answer 23

5/21 and 4/51 are very small.....so you may neglect them...if you r answering an obejective type q it may help...

Answer 24

@mmongazer
practice as many sums as u can.....

Answer 25

yup, practice is really the key to be good in math. :) Practice,practice and practice more as my teacher said.
gtg i'll sleep already :)

Answer 26

good night :))