At a sale, Sally bought a $360 bicycle and paid only $240. Shaun bought a bicycle with original price $480 and he received the same percentage discount as Sally. What price did Shaun pay?

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.