Emma wants to buy a radio, the full price is £80. In the shop, she is given a discount. A year later, she sells the radio for £78, giving her a profit of 30% of what she bought it for the year before. What discount did she receive? (4)
Finding what Emma paid for her radio £78 / 1.3 = £60 (M1) (A1)
Finding what percentage of £80 that is £60 / £80 = 0.8 or 80% (M1)
Recognising the discount is 20% ie. 1-0.8=0.2 (A1)
