Question

what number should be subtracted from 3/7,to get 5/4.​

Answer 1

Answer:

Given (3/7) Let the required number be x (3/7) – x = (5/4) – x = (5/4) – (3/7) The LCM of 4 and 7 is 28 Consider (5/4) = (5/4) × (7/7) = (35/28) Again (3/7) = (3/7) × (4/4) = (12/28) On substituting -x = (35/28) – (12/28) – x = (35 -12)/28 – x = (23/28) x = (-23/28)

Answer 2

Answer:

let the number subtracted be x

then,3/7-x=5/4

x=3/7-5/4

=12+35/28

=47/28

therefore required number=47/8