15% of 45% of a number is 105.3 What is 24% of that number?

When the price of an audio system was reduced by 20%, the sale increased by 80%. What was the net effect on the sale?

if 120% of a is equal to 80% of b, then $${b+a}\over {b-a}$$ is equal to

If A’s income is 40 % less than that of B, how much percent B's income is more than that of A? 

The number obtained by subtracting two-third of 75% of 600 from a number is 320, what is the original number?

In an examination in which full marks were 700, A gets 20 % more than B, B gets 20 % more than C, and Cgets 15 % less than D. If A got 576 marks, then what percentage of full marks did D get? 

Kirti decided to spend 45% of her monthly salary on shopping, after spending Rs 11475 she found that this money was 60% of the amount she spent, what is Kirti's salary?

In an exam, 3 marks are scored on the correct solution, but 2 marks are deducted on the wrong solution. If a student scores 75 questions and gets 75 marks, the correct answer is the number of questions.