sentence1: Their worst-case scenario is the accidental deletion or malicious falsification of ballots from the 1.42 million Californians who could vote on electronic touch-screen machines .
sentence2: Their worst-case scenario is the accidental deletion or malicious falsification of ballots from the 1.42 million Californians voting electronically - 9.3 percent of the state 's 15.3 million registered voters .