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KatRina [158]
3 years ago
5

The mark obtained by Belij in an exam is 28 out of 40, express his obtained marks in percentage​

Mathematics
2 answers:
Gekata [30.6K]3 years ago
6 0

Answer:

70percent

Step-by-step explanation:

28/40 x 100

0.7 x 100

=70 percent

Brut [27]3 years ago
5 0

Marks

= 28/40

= 28/40 × 2.5/2.5

= 70/100

= 70%

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You can find this by first checking if the largest number that is the denominator-- in this case 16-- is already the LCD, which means 16 is divisible by all the other numbers. 

If this does not work, then multiply all the numbers together to get the LCD-- since you multiplied them together, you know that they will all be factors of the product. 

However, you will be able to see that 16 is indeed the lowest common denominator: 

2 × 8=16 

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So, after you find the LCD, multiply both the numerator and the denominator by the number that you would need to multiply the denominator to get the LCD (the whole point is that you want to get the denominator to be the LCD, but to do that you need to multiply both the top and bottom by the same number to keep the fraction the same). 

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3 years ago
Aiden wrote a riddle: Five less than 1/5 times a number is the same as the sume of the number and 1/3. Find the number.
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<em><u>Solution:</u></em>

Let "n" be the number

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\text{ Five less than 1/5 times a number } = \frac{1}{5}n - 5 = \frac{5}{n} - 5

\text{Sum of number and 1/3 } = n + \frac{1}{3} =\frac{3n+1}{3}

Given that,

Five less than 1/5 times a number is the same as the sum of the number and 1/3

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=12.25π/4

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