75 coz if u divide 36/48 x100/1 it will give you 6/8x100/1 and u will divide 6/8 by 2 it will give you 3/4x100/1 that hundred u will divide it by 4 and it will give u 25 then it will remain 3 and 25 then u will multiply 3x25 and the answer will be =75%..thanks