It means that on your test paper, 21% of the required responses
were either missing or wrong.
The letter grade is up to the individual teacher.
It means 79 percent of the people did not was well as he or she did. It also means 21 percent of the people did better.
79 percent out of 100 percent is 79% or 0.79.
79.
79 percent of 300 is 237.
79%
79%
No more than 15.But why miss any ?
79% = 79/100
79% = 0.79 = 79/100
79% = 0.79 = 79/100
.79
100%