Ratio, Proportion and Percentages Puzzle -Critical Thinking 10

Challenge:

Amanda and Dani can paint a room together in 6 hours. If Amanda can paint the room by herself in 8 hours, what percent of the painting does Dani do?

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Amanda can paint the room by herself in 8 hours. Therefore, she can paint $\frac{1}{8}$ of the room in an hour. In the same way, Dani can paint $\frac{1}{x}$ of the room in an hour. Together, they can paint $\frac{1}{6}$ part of the room in an hour. Now, write the equation and solve for x.
$\frac{1}{8}+\frac{1}{x}=\frac{1}{6}⇒\frac{1}{6}-\frac{1}{8}=\frac{1}{24}⇒x=24$
Dani can paint the room in 24 hours. Then, in six hours, Dani paints $\frac{6}{24}$ or $\frac{1}{4}$ part or 25% of the room.

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