It depends on the course and the grading system used. In the United States, an 80-89% is often considered a B, but this is not always the case. Some courses or tests can be challenging enough that one could get 20% of the points and still earn a B.
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The answer is b. 75%.% rate:= 3/4 * 100%= 0.75 * 100%= 75%thus, 3 quarters is equal to 75%
it is a b-
75% of 90 = 75% * 90 = 0.75 * 90 = 67.5
70
10% is 1/10 of 100%, so you can do either process: a) divide 75 by 10 = 7.5 b) multiply 75 by 0.1 = 7.5