中一數學題

1.A pair of shoes costs $200.A shopkeeper sells it at a loss of $10.

(a)Find the selling price and the loss percentage of the shoes.

(b)If the shop marks the pair of shoes at $250, what discount percentage will be given to the customer?

2.Paul bought a electronic game at $750 and sold it to John at a profit of 20%.Later,
John sold the game to George.

(a)How much did John pay to Paul?

(b)If George paid $60 more than Paul, what is the profit/loss percentage of John?