 Hello and welcome to the session. In this session we discussed the following question which says what should be subtracted from minus 1 upon 3 to get 2 upon 5? Let's move on to the solution. Let the required number to be subtracted be x. So then we have minus 1 upon 3 minus x is equal to 2 upon 5. This means we have x is equal to minus 1 upon 3 minus 2 upon 5. That is x is equal to... Now to subtract these two rational numbers we need to take the LCM of the denominators 3 and 5 which is 15. So here we get in the numerator minus 5 minus 6 and now we have x is equal to minus 11 upon 15. Thus we say minus 11 upon 15 should be subtracted from minus 1 upon 3 to get 2 upon 5. Thus our final answer is minus 11 upon 15. This completes the session. Hope you have understood these solutions for this question.