Assuming your teacher doesn't grade on a curve, then yes, anything less than 60% would be an F.
It is an F.
57% = 0.57
F or D, either way, not good
57 percent
57 percent of 21 is 11.97
57 percent = 57% = 57/100 in fraction in lowest term
57 percent of 130 is 74.1
A temperature that is 25 degrees lower than 57°F would be 32°F, as 57-25=32.
57 %
.57
(57% + 73%) / 2 = 65%
57 out of 100 is equal to 57%.