Question

Karen was in a trivia contest and got 18 of the 20

Answer 1

Ur fraction will be 18/20 so just multiply the numerator and denominator by 5 Now we can see that our fraction is 90/100, which means that 18/20 as a percentage is 90%.

Answer 2

$\large\bf{\underline{Given:}}$

• Total questions = 20
• correct one = 18

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$\large\bf{\underline{To\:find:}}$

• Percentage of wrong questions

$\bf{⟹20 -18 = 2 \: questions}$

$\bf{Let\:the \:percentage\:of \:wrong\: question\:be\:x}$

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$\large\bf{\underline{Therefore:}}$

‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎$⟹x\% \: of \: 20 = 2$

‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎$⟹ \frac{x}{100} \times 20 = 2$

‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎$⟹x = 2 \times \frac{100}{20}$

‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎$⟹x = 10$

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$\large\bf{\underline{Hence }}$

$\bf{⟹10\%\:of \:the \:questions\: she\: get\: wrong}$