6.4k FD + fade gives u 8.32 FD (6.4*130/100) value or will it give u 6.4kFD with addition of extra 30%..
Ok i get it now.. thanks for answering
Remember that the FD number is only applicable in calculating 'Gear FD.' All other FD matters are additive as shown in the examples above. They are not 'interchangeable' as you described via the 8.32k FD example.