Finding percentage increase

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white bread: serving size 63 g Protein - 5.2 g

Wholemeal bread : serving size 53g Protein- 6.5 g

Which bread contains more protein and by what percentage ?

The answer is whole meal bread , 4.01% but I don't know how to get it . Can someone help me ?

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The percentage of proteins in the white bread is $\dfrac{5.2}{63}\cdot 100=8.25 \%$

The percentage of proteins in the wholemeal bread is $\dfrac{6.5}{53}\cdot 100=12.26 \%$

and the difference is $ 4.01 \%$