Power efficiency of SSB-Large carrier
When m=.5 total power is given by
Pt(total power)=pc(power of carrier)*(1+m²/2)

=Pc(1+(0.5)²/2)
   =1.125Pc

One sideband power

Psb=Pc.m²/4

=Pc.(0.5)²/4
  =0.0625Pc

Savings In power

(1.125-0.0625)/1.125

=94.4%