In IEEE 754 single precision, according to the given format:
- sign bit= 1 (the number is negative)
- exponent=$(10111101)_2=(189)_{10}$
- Mantissa=$100100...000$
So $V_E=(-1)^s*1.M*2^{E_B-127}$
$V_e=(-1)^1*1.10010*2^{189-127}$
$V_E=(-1)*(1.5625)_{10}*2^{12}*2^{50}$
$V_E=-6400*2^{50}$
So the $P=-6400$
Ref: Floating point