Answer :

Final answer:

You can convert a fraction to a percentage by dividing the numerator by the denominator and then multiplying the result by 100. Therefore, 7 out of 50 equals to 14% and 18 out of 20 equals to 90%.

Explanation:

To convert a fraction into a percentage you can apply the following method. Firstly, you need to divide the numerator (the top number) of the fraction by the denominator (the bottom number). Then, you multiply the result by 100 to get the percentage.

For example, to convert 7 out of 50 into a percentage, you would divide 7 by 50 to get 0.14. Then, multiply 0.14 by 100 to reach 14%.

For 18 out of 20, divide 18 by 20 to get 0.9. Then, multiply this by 100 to reach 90%.

In conclusion, 7 out of 50 is equal to 14% while 18 out of 20 is equal to 90%.

Learn more about percentage conversion here:

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7/50 = 0.14
0.14 x 100 = 14
14%

18/20 = 0.9
0.9 x 100 = 90
90%