    Sentence 1: Subway and bus fares rose 33  percent , from $ 150 to $2, on May 4,  while tickets on suburban trains rose an  average 25 percent May 1.    Sentence 2: Subway and bus fares rose  33 percent , from $1.50 to $ 2, on May 4  , while average 25 percent increases took  effect May 1 on suburban trains .