Respuesta :

SOLUTION:

Step 1:

In this question, we are meant to solve the following:

45%of what is 81?

Step 2:

Let the unknown number be x, such that:

[tex]\begin{gathered} 45\text{ \% of x = 81} \\ \frac{45}{100}\text{ of x = 81} \\ \\ \frac{45x}{100}=81 \\ \end{gathered}[/tex]

Cross-multiply, we have that:

[tex]\begin{gathered} 45x\text{ = 8100} \\ \text{Divide both sides by 45, we have that:} \\ \text{x =}\frac{8100}{45} \\ x\text{ = 180} \end{gathered}[/tex]

CONCLUSION:

The final answer is:

[tex]x\text{ = 180}[/tex]

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