McDonald’s says global sales declined in February, including a four per cent drop in the US that the company blamed on “aggressive competitive activity”. The world’s biggest hamburger chain says global sales fell 1.7 per cent at established locations. In the division including Asia, the Middle East and Africa, sales were down 4.4 per cent. The figure edged up 0.7 per cent in Europe. McDonald’s Corp, based in Illinois, is trying to reinvigorate its image amid shifti