What is the correct number when you decrease 620 by 85%?

 

What is the correct number when you decrease 240 by 45%?

What is the correct number when you decrease 60 by 15%?

 

What is the correct number when you increase 50 by 40%?

 

What is the correct number when you increase 30 by 20%?

Which is the correct number when you increase 20 by 10%?