How are bits grouped to convert binary to hex?

In fours from the binary point, padding with zeros

Convert (10.0101)₂ to hexadecimal

Short answer

Group bits from the binary point: 10 → 0010 (2), .0101 → 0101 (5); result is (2.5)₁₆.

Convert (10.0101)₂ = (?)₁₆.

Group the bits in fours starting from the binary point: to the left for the integer part and to the right for the fraction, padding with zeros.

 Integer : 10      -> 0010 -> 2
 Fraction: .0101   -> 0101 -> 5

Check in decimal: $(10.0101)_2 = 2 + 0.25 + 0.0625 = 2.3125$ , and $(2.5)_{16} = 2 + 5/16 = 2.3125$ .

Answer: $(10.0101)_2 = (2.5)_{16}$

✓ Answer checked by Claude Opus 5.5 (high effort)