$A$ man bought apples at the rate of $6$ for $Rs. 20$ and sold them at $4$ for $Rs. 16$. His estimated profit $\%$ is

$A$ vendor bought toffees at $6$ for a rupee. How many for a rupee must he sell to gain $20 \%$?

$A$ shopkeeper sold an article offering a discount of $5 \%$ and earned a profit of $23.5 \% .$ What would have been the percentage of profit earned if no discount was offered?

Kamya purchased an item for $Rs.\, 46,000$ and sold it at a loss of $12\%$. With that amount,she purchased another item which she sold at a gain of $12\%$. What was her overall gain or loss?

$A$ shopkeeper sold sarees at $Rs. 266$ each after giving a $5\%$ discount on the labelled price. Had he not given the discount,he would have earned a profit of $12\%$ on the cost price. What was the cost price of each saree? (in $Rs.$)

$A$ man sells two houses at the rate of $Rs. 1.995$ Lakhs each. On one house he gains $20 \%$ and on the other he loses $20 \%$. His gain or loss per cent in the whole transaction is