If 25 percent of x is 80 what is 90 percent of x

asked Nov 27, 2019 125k views

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Method 1:

$\begin{array}{cccc}25\%&-&80&|:5\\5\%&-&16&|\cdot18\\90\%&-&288\end{array}\\\\Answer:\ 90\%\ of\ x\ is\ equal\ 288$

Method 2:

$\begin{array}{ccc}25\%&-&80\\90\%&-&a\end{array}\ \ \ |\text{cross multiply}\\\\25a=90\cdot80\ \ \ |:25\\\\a=(7200)/(25)\\\\a=288\\\\Answer:\ 288$

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