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Since the quiz/test (or whatever it may be) is out of '40' we know that 40 out of 40 is 100%, or the full marks.
Now, since we know that, we can divide 28 by 40.
28/40 = 0.7
After, we take this number and multiply it by 100 to make it equal to the percentage..
0.7 x 100 = 70
So, 28 out of 40 is equal to 70%
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Continue Learning about Other Math
When a number is decreased by 30 percent of itself the result is 28?
When 40 is decreased by 30% the result is 28.
When a number is decreased by 30 percent of itself the result is 28 what is the number?
40
What is 30 percent off 40 dollars?
30% off of 40 dollars = 70% [left] of 40 dollars = 40*70/100 = 28 dollars
A pair of inline skates that usually sells for 40 is on sale at a 30 percent discount What is the sale price?
28
What is the number that when decreased by 30 percent of itself with the result being 28?
Let that number be x. So we have, x - 0.3x = 28 0.7x = 28 7x = 280 x = 40 Check.
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