Arun buys one kilogram of apples for $Rs.\, 120$ and sells it to Swati gaining $25 \%$. Swati sells it to Divya who again sells it for $Rs.\, 198,$ making a profit of $10 \%$. What is the profit percentage made by Swati?

A man sells an article at a loss of $5 \% .$ If he had bought it at $20 \%$ more and sold it for $Rs.\,115$ less, he would have made a loss of $40 \% .$ Find the cost price of the article.

Rajesh purchased a mobile phone and a refrigerator for $Rs.\, 12000$ and $Rs.\, 10000$ respectively. She sold the refrigerator at a loss of $12$ percent and mobile phone at a profit of $8$ per cent. What is her overall loss$/$profit?

Ram purchased a Computer set of $Rs.\, 12500$ and spent $Rs.\,300$ on transportation and $Rs.\, 800$ on installation. At what price should he sell it so as to earn an overall profit of $15 \% ?$ (in $Rs.$)

Find a simple discount equivalent to a discount series of $10 \%, 20 \%$ and $25 \%$ (in $\%$)

A man buys an article for $Rs.\;27.50$ and sells it for $Rs.\, 28.60.$ Find the gain percent?