Pg 316 of book T.R. Jain and V.K. Ohri question no. 2, second last step 11.5 - 4.5 / 11.5 + 4.5 must give the answer 7/16 instead of 7/76 and then the answer should be equal to 0.437.
@ Raj Kumar, the solutions to the numerical problems of T.R.Jain and V.K.Ohri are available on Meritnation.com. You can view them by following the link provided below.