Octal to Decimal:-

$(532.125)_8 = (5 * 8^2) + (3*8^1) + (2 * 8^0) + (1 * 8^{-1} ) + (2 * 8^{-2}) + (5 * 8^{-3}) = 346 + 0.166015625 = (346.01660.15625)_{10}$

Octal to Binary:-

Convert each octal digit into its binary equivalent.

$(532.125)_8$ = 101 011 010 . 001 010 101 = $(101011010.001010101)_2$

Octal to Hexadecimal:-

By using binary equivalent of the octal number, we divide the binary equivalent into a group of 4 digit to obtain its hexadecimal equivalent.

$(532.125)_8 = (101011010.001010101)_2$ = 0001 0101 1010 . 0010 1010 1000 = $(15A.2A8)_{16}$