A man buys $10$ articles for $Rs.\, 8$ and sells them at $Rs.\, 1.25$ per article. His gain percent is

By selling cloth at $Rs.\, 9$ per meter, a shopkeeper loses $10 \% .$ Find the rate at which it should be sold so as to earn profit of $15 \%$ (in $RS.$)

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 $Rs.$)

A vendor started selling vegetables at $Rs. 10$ per $k g,$ but couldn't find buyers at this rate. So, he reduced the price to $8.10 / kg ,$ but uses a faulty weight of $900\, g$ for $1\, kg .$ Find the percent change in the actual price or loss.

Seema sells a pen to Sapna at a profit of $25 \% .$ Sapna sells it to Asha at a profit of $10 \%$ and Asha sells it to Kavita at a profit of $5 \%$. If Asha sells it for $Rs.\,231,$ find the cost price at which Seema bought the pen? (in $Rs.$)

On selling an article for $Rs.\, 500$ the loss incurred is $20 \% .$ To make a profit of $20 \%$ the article must be sold at in $Rs.$?