35%
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50 is half of 100; 50 x 2 = 100 35 x 2 = 70 answer is 70%
Percentage increase from 50 to 70 is (20/50) x 100 = 40% Percentage decrease from 70 to 50 is (20/70) x 100 = 28.5714%
To find 50 percent of 70, you can multiply 70 by 0.50 (which represents 50 percent as a decimal) or divide 70 by 2 (since 50 percent is half of 100 percent). Both methods will give you the same result, which is 35.
It is not possible to answer the question without knowing how much of the total each one is worth. If they are both equally important, then the answer is 50% but they are rarely (if ever) equally important. If the test grade is worth x percent of the total - not your grade but how much weight it carries in the total - then the average is [x*70+(1-x)*30]/100
6 wrong means 14 correct. 14/20 * 100% is 70%.