30% of 80% of 36% of an amount is ₹ 216. What is the amount?

If 40% of an amount is 250, what will be 60% of that amount?

If 30% of P is added to 40% of Q, it becomes 80% of Q. Accordingly, what is the percentage of Q with respect to P?

A's weight is 25% of B's weight and 40% of C's weight. What percentage of C's weight is B's weight?

If 30 % of 1520 + 40 % of 800 = x % of 5000, find the value of x.

A student scored 65% marks in an exam. If he scored 78%, 70%, 62% and 65% marks in four subjects out of five subjects, then what is his percentage of marks in the fifth subject?