Evaluate
\frac{9p}{10}
Differentiate w.r.t. p
\frac{9}{10} = 0.9
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\frac{p\times \frac{1}{9}\times 81}{10}
Divide p\times \frac{1}{9} by \frac{10}{81} by multiplying p\times \frac{1}{9} by the reciprocal of \frac{10}{81}.
\frac{p\times \frac{81}{9}}{10}
Multiply \frac{1}{9} and 81 to get \frac{81}{9}.
\frac{p\times 9}{10}
Divide 81 by 9 to get 9.
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