In a sale a TV is reduced from £400 to £320.What is the percentage reduction?

Question

 Please help me with this question.It is a Year 8 Revision question.Or can you find the website of this paper and send it to me .

Answer 1

% of decrease = difference of the two amounts

                             original amount

 

% of decrease = 400 - 320

                                400

 

% of decrease = 80/400 = .2 = 20%