Verified Answer :

naǫ

\(42 \ out \ of \ 50=\frac{42}{50}=\frac{42 \times 2}{50 \times 2}=\frac{84}{100}=\boxed{84\%}\)

84%. You start out with 42/50. You need to then multiply the numerator and the denominator by 2 which will give you 84/100 which will then give you 84%.

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