Ratio, Proportion and Percentages Puzzle – Challenge 27
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Challenge:
The ratio of sugar to flour for cooking a cake is \(\frac{1}{2}\) to \(2\). What percent of the cake is flour? (Assume that there are only sugar and flour in the cake)
A- \(50\%\)
B- \(60\%\)
C- \(70\%\)
D- \(80\%\)
E- \(90\%\)
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The correct answer is D.
The ratio of sugar to flour is \(\frac{1}{2}\) to \(2\). Therefore, the ratio of the flour to whole is \(2\) to \(2\frac{1}{2}\) or \(\frac{2}{2\frac{ 1}{2}} = 0.8 = 80\%\)
Therefore, \(80\%\) of the cake is flour.
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