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marysya [2.9K]
4 years ago
14

A portable electronic typewriter cost £180 in 1988. Its price rose by 5% in 1989. What was the new price?

Mathematics
1 answer:
elena-s [515]4 years ago
5 0

\bf \begin{array}{|c|ll} \cline{1-1} \textit{a\% of b}\\ \cline{1-1} \\ \left( \cfrac{a}{100} \right)\cdot b \\\\ \cline{1-1} \end{array}~\hspace{5em}\stackrel{\textit{5\% of 180}}{\left( \cfrac{5}{100} \right)180}\implies 9~\hfill \stackrel{\textit{new price}}{180+9\implies 189}

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