someone help me for max points and brainliest

Well, the directions are laid out for you...
If F = 0.3444…, then 10F = 3.444.... Subtracting F from this gives
10F - F = 3.444… - 0.3444…
9F = 3.1
Solve for F.
F = 3.1/9 = (31/10)/9 = 31/90
so you would enter 90.