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8 is 40% of 20.

Step-by-step explanation:

Solving for A

Filling in for A would be the part of 20 in which you are looking for, so you would place 8.

Solving for B

B is 20, for that is the whole product you have and are trying to find a portion of.

Solving for C

By looking at this equation, you can see that 100 is divisible by 20. The answer to that is 5. So therefore, to create an equal equation, you can multiply the entire left fraction by 5 to solve for C. 20x5 = 100, and 8x5 = 40. This means that 8/20 is equivalent to 40/100, therefore 8 is 40% of 20.

1/4 because there is 4 grades.