The company blamed the quarterly sales dip on intensifying competition and a soft economy. Its net income rose sharply, however, as a result of reduced restaurant expenses and growth overseas.
Executives at McDonald's have also been blaming weak sales on the double whammy of heightened competition and a choppy economy. But other chains such as Chipotle and Starbucks have reported healthy sales, suggesting people are willing to spend on certain types of food and drinks.
As they fight to keep drawing in customers, McDonald's, Burger King and Wendy's have pushed deals more aggressively. Macedo noted that Burger King's deals are designed to maintain profit margins. A deal that offers two sandwiches for $5, for example, on average gets people to spend about $9 when including sides and drinks, he said.
(Read more: Burger King offers free fries)
As for Satisfries, the initial increase in customer visits Burger King saw may be tied to the fanfare and promotions around the launch. McCain Foods, which supplies the fries, has said it plans to work with other restaurant operators to sell the reduced-calorie fries.
"They've only been out there for four weeks, so it's premature to say whether it's a home run or not," Macedo said. Either way, he noted that they weren't going to "turn around the business."
The fries are just the latest gambit by Burger King Worldwide to boost its image. The company has been revamping its business since it was purchased in 2010 by 3G Capital, an investment firm run by Brazilian billionaires. It has been selling more restaurants to franchisees to reduce overhead costs.
For the quarter, Burger King earned $68.2 million, or 19 cents per share. A year earlier it earned $6.6 million, or 2 cents per share.
Excluding certain items, earnings were 23 cents per share, above the 21 cents per share analysts expected.
Revenue declined 40 percent to $275.1 million, mostly because sold more restaurants to franchisees, so books less revenue from those locations.
Wall Street expected $264.5 million. Stripping out the impact of the refranchising and foreign currency fluctuations, revenue rose 8.1 percent.
Global sales at restaurants open at least a year rose 0.9 percent. This figure is a key indicator because it strips out the effects of newly opened or closed locations. The strongest performance was in the Asia-Pacific region, which posted a 3.7 percent rise. Latin America and the Caribbean and Europe, the Middle East and Africa also reported improved results.
(Read more: After Buffet buyout, McDonald's squeezes Heinz)
Burger King boosted its quarterly dividend by a penny to 7 cents per share. Its stock rose 5 percent to $20.73 in morning trading. So far this year, its shares have risen about 16 percent.
The company has more than 13,000 restaurants around the world.
—By the Associated Press