McDonald's announced on Tuesday its worldwide restaurant comparable sales have increased by 6 percent in August from 3.4 percent last year.

Comparable sales measures revenue at the a location that has been open for at least one year.

European stores experienced the highest comparable sales, increasing by almost 9 percent. McDonald's stores, particularly in France, Germany and the United Kingdom, have boosted marketing along with a wider menu choice.

Countries in Africa, Middle East and Asia ranked second with comparable sales increasing by 6 percent due to the strong performance reported in Japan.

The franchise in the US, best known for its Big Mac, recorded a weaker comparable sales increase of only 0.3 percent from last year to 3.5 percent this year.

"Our ongoing efforts to enhance the McDonald's experience continue to attract even more customers into our restaurants. This intense focus on customers contributed to another consecutive month of strong global comparable sales growth' McDonald's Chief Executive Officer Jim Skinner said.

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