The total number of flyers Belinda’s friends passed out was 42 by Ryan + 67 by Alyssa + 51 by Scott = <<42+67+51=160>>160 flyers.
Belinda passed out 200 total flyers – 160 flyers passed out by friends = <<200-160=40>>40 flyers.
To express this as a decimal, divide Belinda’s 40 flyers / 200 total flyers = <<40/200=0.20>>0.20.
Belinda passed out 0.20 x 100% = 20% of the flyers.
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