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Answer :
Lydia answered 15/20 questions correctly. In percentage, Lydia answered 75% of questions correctly.
Percent represent a fraction of a hundred.
For example:
60% = 60/100
Percent is used to express some part of a whole. For example, 60% of 20 is equal to:
60% x 20 = (60/100) x 20
= 1200/100 = 120
To convert a regular fraction into a percent, multiply it by 100%.
Example: We want to find 3/4 is equivalent to which percent. Then,
3/4 = 3/4 x 100%
= (300/4)% = 75%
In this problem, Lydia answered 15 out 20 questions correctly. It means:
15/20 = 15/20 x 100%
= (1500/20)% = 75%
Learn more about percent here:
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