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Anonymous Anonymous
  • 02-02-2015
  • Mathematics
Answered

A bakery sold 111 cupcakes in one day. The head baker predicted he would sell 91 cupcakes that day. What was the percent error of the baker's prediction?






18.02%






81.98%






20%






21.98%

Verified Answer :

Anonymous Anonymous
  • 04-02-2015

\(111-91=20-error\\\\\begin{array}{ccc}91&-&100\%\\\\20&-&p\%\end{array}\ \ \ |cross\ multiply\\\\\\91p=100\cdot20\\91p=2000\ \ \ \ |divide\ both\ sides\ by\ 91\\\\\boxed{p\approx21.98\ (\%)}\leftarrow answer\)

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