an f 50% and below is an f 50% to 60% is a d 70% to 80% is a c 80% to 90% is a b 90% and above is an A 13/55 on a calculator do 13 divided by 55 and get 0.236363636 and you get your percent of 24%
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73% or C
Between 13 and 14. Be on the safe side.
You use division. For example 13/47 is approximately 0.276 or 28%. 100-28 is 72 so the grade would be a 72.
-13 multiplied by 55 is -715
The grade is 63.