Perquistes for the ay 2018 -2019

Dear Sir,

                    When employer Under Head GROSS SALARY  icludes"Value of Perks Under Sec 17(2)", and 

                      Deduct TDS; 

                     (i) Is the Value of perks fully taxable

                     (ii) What can be the percentage of Perks / amt, wrt Salary.

                     (ii) Can we get exemption for Value of Perks

                      Please Advice.