$60 = ? \% \text{ of } 400$

$0.15 \%$ of $33 \frac{1}{3} \%$ of $Rs. 10,000$ is?

If $40 \%$ of a number is equal to two-third of another number,what is the ratio of the first number to the second number?

If $25 \%$ of a number is subtracted from a second number,the second number reduces to its five-sixths. What is the ratio of the first number to the second number?

The product of one-third of a number and $150 \%$ of another number is what percent of the product of the original numbers?

$75 \%$ of $480 = x \times 15$. Find the value of $x$.