He has 16 hours because 2 x 8 = <<2*8=16>>16
He is going to spend 25% of his time reading because 100 - 75 = <<100-75=25>>25
He has 4 hours to read because 16 x .25 = <<16*.25=4>>4
He will read 240 pages because 4 x 60 = <<4*60=240>>240
He will read 3 books because 240 / 80 = <<240/80=3>>3
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