Ok I'll try this
Original scan
The average human foot is 26.3 cm = 0.263 meters
Compare the distance from Electro lightning starting distance and Daredevil foot you get a perfect match
We must find how much Daredevil moved and to do that we will use the wind lines (implying he move from there to get where he is now)
26.3/0.5 cm = X/1.5cm
39.45 = 0.5X
39.45/0.5
78.8cm = 0.788 Meters is the distance he moved
Now for the lightning formula
0.788 X 440000 = 346720
346720/0.263 = 1318326.9 meters a second or Mach 3874.13
Taking the fact that he did this in a split second
3874.13/0.5 (Daredevil stated he dodged it in a split second)
Mach 7748.26