sentence1: Subway and bus fares rose 33 percent , from $ 1.50 to $ 2 , on May 4 , while tickets on suburban trains rose an average 25 percent May 1 .
sentence2: 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 .