A men gains $20 \%$ by selling an article for a certain price. If he sells it at double the price, what will be the percentage of profit?

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?

If eggs are bought $12$ for $Rs.\, 10$ and sold at $10$ for $Rs.\, 12$. What is the gain or loss $\%.$

Rita buys an article for $Rs.$ $9600.$ She sold it at $12 \%$ loss and get some money and from that money she again buys an article and this time she got $12 \%$ profit. What was profit or loss she got form this transaction in $Rs.$?

Profit earned by an organization is distributed among officers and clerks in the ratio of $5: 3 .$ If the number of officers is $45$ and the number of clerks is $80$ and the amount received by each officer is $Rs.\,25,000,$ what was the total amount of profit earned? (in $Rs.$.......$lakhs$)

A shopkeeper sells $20$ pencils for the same amount of money as he paid for $25$ pencils. What is his gain percent?