40 percent of 2,810,000,000 = 0.840 percent of 2,900,000,000 = 0.840 percent of 2,900,000,000,000 = 0.840 percent of 2.1 million = 0.8440 percent of 2.2 billion = 0.8840 percent of 2.3 = 0.9240 percent of 2.37 million = 0.9540 percent of 2.38 = 0.9540 percent of 2.525 million = 1.0140 percent of 2.53 million = 1.01