A book seller allowed 10 % discount on printed price. He gets 30 % commission from publisher. His profit in percent will be? 

The sum of weights of A and B is 80 kg. 50% of A's weight is $${5\over6}$$ times the weight of B. Find the difference between their weights. 

What will be the change in the volume of a rectangular solid by increasing its length by 10 percent and decreasing its width by 10 percent?

If there is a 25 percent reduction in the price of rice, a person can buy 10 kg more rice for Rs 600. The reduced price per kg of rice is.

A student scored 32 percent and failed by 8 Marks. If he had scored 36 percent marks, he would have passed by 2 marks. What is the passing score?

Peter bought an item at 20% discount on its original price. He sold it with 40% increase on the price he bought it. The new sale price is greater than the original price (in percent) by: 

 In a test consisting of 140 Questions, a candidate correctly answered 70% of the first 80 questions. What percentage of the remaining questions does the candidate need to correctly answer to score 60% in the test?

A man gives 20% of his money to his eldest son, 30% of remaining he gives to his younger son. 10% of the remaining he gives in a school for poor boys still he has Rs.100.80. Find his total sum.