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If Jennifer made a fruit juice using red and green grapes. Thirty percent of the grapes are green.If she used a total of 60 grapes , how many red grapes should she use?



Answer :

[tex]p\%=\frac{p}{100}\\\\30\%=\frac{30}{100}=0.30=0.3\\\\30\%\ of\ 60=0.3\cdot60=18\leftarrow\ number\ of\ green\ grapes\\\\60-18=\boxed{42}\leftarrow ANSWER[/tex]

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