Question

simplify 6*3/10-2*3/4-1*2/5

Answer 1

Solution:-
Given :
6 by 3/10 - 2 by 3/4 - 1 by 2/5
This is in mixed fraction, so first of all we have to convert it in improper fraction.
6 by 3/10 = {(10*6) + 3}/10
(60 + 3 )/10
= 63/10
2 by 3/4 = {(4*2) + 3}/4
= (8 + 3)/4
= 11/4
1 by 2/5 = {(5*1) + 2}/5
= (5 + 2)/5
= 7/5
Now, we will take the L. C. M. of 10, 4 and 5, which is 20

63/10
= (20/10)*63
= 2*63
126/20
11/4
= (20/4)*11
= 5*11
= 55/20
7/5
= (20/5)*7
= 4*7
= 28/20
Now,
126/20 - 55/20 - 28/20
= 126/20 - 83/20
= 43/20
= 2 by 3/20
Answer.

Answer 2

6 3/10-2 3/4-1 2/5
=63/10-11/4-7/5
=63/10-(11/4+7/5)
=63/10-(55+28)/20
=63/10-83/20
=(126-83)/120
=43/120