Bargain
Weekly Problem 11 - 2013
A shop has "Everything half price", and then "15% off sale prices". What is the overall reduction in cost?
A shop has "Everything half price", and then "15% off sale prices". What is the overall reduction in cost?
Age
14 to 16
Challenge level
Problem
A shop advertised "Everything half price in our sale", and then advertised that there is "An additional 15% off sale prices".
Overall, this is equivalent to what reduction on the original prices?
If you liked this problem, here is an NRICH task that challenges you to use similar mathematical ideas.
Student Solutions
Answer: 57.5% off
15% off 50% = 50% $-$ 15% of 50%
= 50% $-$ 7.5%
= 42.5%
Which is 57.5% off