When $40$ is subtracted from $30 \%$ of a number,the result is $50$. What is the value of the number?

When the price of an article is reduced by $15 \%$,the sales increase by $35 \%$. The percentage change in the total amount of receipts is:

When a number is divided by $12$,the quotient becomes $1/4$ of another number. By what percentage is the first number greater than the second number?

Which one of the following shows the best percentage?

$A$ merchant has announced a $25 \%$ rebate on the prices of ready-made garments at the time of sale. If a purchaser needs to have a total rebate of $₹ 400$,then how many shirts,each costing $₹ 320$,should they purchase?

$0.15 \%$ of $33 \frac{1}{3} \%$ of $₹ 10000$ is