Well yesterday the french news post that Macron is winning Le pen with 68% of the population, it is obvius who is gonna win by now.
A large part of the population is going to abstain, and it can alter these calculations. The lower the turnout, that much brighter will be the chances for Le Pen. But I still expect her to loss by a margin of 10+ points.
The smaller the voter turnout the more chances of Him to win the election. Not going to vote, only those who have not decided on the candidacy. So the ratio is 61% to 39% and will remain so.