Andrew received 100 x 1/5 = <<100*1/5=20>>20 stickers.
So, there were 100 - 20 = <<100-20=80>>80 stickers left.
Bill received 80 x 3/10 = <<80*3/10=24>>24 stickers.
Therefore, Andrew gave away 20 + 24 = <<20+24=44>>44 stickers.
#### 44