def param_update
    @hp.set_rect(hp_rate,@hp.height)
      if player.hp.to_f / player.mhp = <0.5>0.25
        def normal_tone

        Tone.new(255,0,0,255)

      end
       
        else
          if player.hp.to_f / player.mhp = <0.26>0.0
            def normal_tone

            Tone.new(255,-255,0,255)

          end
         
            else
         
              def normal_tone

                Tone.new(0,0,0,255)

              end
       
       
    @mp.set_rect(mp_rate,@mp.height)
    @exp.set_rect(exp_rate,@exp.height)
    [@hp,@mp,@exp].each {|i| i.update }
  end

이렇게 작성을 했는데 부등호를 인식을 못하는것 같은데 어떻게 해야 플레이어의 hp가 0.26보다 작을때를 나타낼수 있을까요?