There were 600 - 240 = <<600-240=360>>360 boys at the beginning of the game.
So, 360 x 1/4 = <<360*1/4=90>>90 boys left early.
And 240 x 1/8 = <<240*1/8=30>>30 girls left early.
A total of 90 + 30 = <<90+30=120>>120 people left early.
Therefore, 600 - 120 = <<600-120=480>>480 people remained to see the end of the game.
#### 480