A shop buys and sells products Sell at Dh 9 Click on screen A bank is a money shop A shop buys and sells products Sell at Dh 9 Buy at Dh 4 Profit Dh 5 The bank buys and sells FOREIGN CURRENCY Sell at Dh 4.34971 By buying and selling one Euro, Buy at Dh 4.24135 the bank makes a profit of 11 fils Profit Dh 0.10836

Use headphones or loudspeakers The customer sells Euros The bank buys Euros Use the buy rate buy sell Solve the proportion x = 50 x 4.24135 Set up a proportion x = 212.0675 1 Euro 4.24135 4.34971 = Dh x 1 EURO : Dh 4.24135 = …… EURO : Dh ……. For 50 Euros the customer gets Dh 212.07 50

x = 100 / 4.34971 x = 22.99003842 x The customer buys Euros Do not think in Dirhams Think in Euros The bank sells Euros Use the sell rate The customer exchanges 100 Dirhams Set up a proportion Solve the proportion buy sell x = 100 / 4.34971 x = 22.99003842 1 Euro 4.24135 4.34971 = Dh x 1 EURO : Dh 4.34971 = …… EURO : Dh ……. 100 For 100 dirhams the customer gets Euro 22.99