Question

subtract (2/7 - 5/12 ) from the sum 3/4 ,5/7 ,7/12

Answer 1

here the answer is 2.178571 or 183/84

Answer 2

Answer:

Step-by-step explanation:

(3/4 + 5/7 + 7/12) - (2/7 - 5/21)

First we have to take out the LCM of the denominators 4, 7, 12 will be 84

And the LCM of 7 and 21 will be 21

=(3×21 / 4×21 + 5×12 / 7×12 + 7×7 / 12×7)- (2×3 / 7×3 - 5/21)

=( 63+60+49 / 84 ) - ( 6-5 / 21)

=172/84 - 1/21

LCM of 84 and 21 will be 84

Then,

172/84 - 1×4/21×4

= 172-4 / 84

= 168 / 84

By simply reducing it will come 2/1

2/1 will be your answer