<human>:  Billy can spit a watermelon seed 30 inches. Madison can spit a watermelon seed 20% farther than Billy. Ryan can spit a watermelon seed 50% shorter than Madison. How far can Ryan spit a watermelon seed?
<bot>: How far can Madison spit a seed? ** Madison can spit a seed 20% farther than Billy's 30 inches so that's .20*30 = <<20*.01*30=6>>6 inches farther
How far can Billy spit a seed? ** Billy spits a seed 30 inches and Madison can spit 6 inches farther for a total of 30+6 = <<30+6=36>>36 inches
How far can Ryan spit a seed? ** Ryan can spit a seed 50% shorter than Madison's 36 inches for a total of .50*36 = <<50*.01*36=18>>18 inches
#### 18