If a shirt costs Rs. 800 and is discounted by 25%, what is the discount amount?

What is 75% of 320?

What percentage is 18 out of 90?

60 is 20% of what number?

What is 8% of 250?

What is 30% of 150 plus 10% of 50?

If 90% of a number is 180, what is the number?

A price dropped from 250 to 200. What is the percentage decrease?

A population grew by 20% then decreased by 10%. If the original was 1000, what is the final population?

A number increased from 80 to 100. What is the percentage increase?

An item's price increased by 25% to Rs. 500. What was the original price?