Question

In $2008$, Hansi earned $7800$.
i) He earned $15\%$ more in $2009$. Calculate how much he earned in $2009$.
ii) In $2010$ he earns $10\%$ more than in $2009$. Calculate the percentage increase in his earnings from $2008$ to $2010$

Answer 1

$1)$ earned money is $2009$ is $=7800+7800\times \frac{15}{100}$

$=7800+1170$

$=Rs8970$

$2)$ in $2010$ is $8970+8970\times \frac{10}{100}$

$=Rs9867$

Let percentage $=x$

$\Rightarrow 7800\times \frac{x}{100}=9867-7800$

$\Rightarrow 78x=2067$

$\Rightarrow x=\frac{2067}{78}$

$\Rightarrow x=26.5\%$

Hence,

The percentage increase in his earning from

$2008$ to $2010$ is 26.5%