| About 8 percent of earth's crust | 36 |
| About 78 percent of our atmosphere | 34 |
| About 75% of the earth's surface | 36 |
| About 75 percent, in school | 27 |
| About 71% of the earth's surface | 36 |
| About 70 percent of the globe | 29 |
| About 70 percent of the earth's surface | 43 |
| About 70 percent of Earth's surface | 39 |
| About 7% of the United States | 29 |
| About 7% of it is American | 26 |
| About 7 cm long, like nails sold in hardware stores | 51 |
| About 687 Martian days | 22 |
| About 66 degrees south latitude | 31 |
| About 640 acres: Abbr. | 22 |
| About 624 billion electron-volts | 32 |
| About 600 miles of underground passages near Rome | 49 |
| About 60% of the world's population | 39 |
| About 60% of the world's inhabitants | 40 |
| About 60 percent of us | 22 |
| About 60 liters of watery domestic, typically | 45 |
| About 6.5% of the Earth's land | 34 |
| About 6.2 mi. | 13 |
| About 6,080 feet | 16 |
| About 6 trillion mi. | 20 |
| About 5:00, on a compass | 24 |
| About 57% of American college students | 38 |
| About 57 degrees, mathematically | 32 |
| About 525 trillion minutes, in astronomy | 40 |
| About 500 sheets of paper | 25 |
| About 50% of calls | 18 |
| About 5/8 of a mi. | 18 |
| About 5/8 mi. | 13 |
| About 5.9 trillion mi. | 22 |
| About 5.88 trillion miles | 25 |
| About 5.88 trillion mi. | 23 |
| About 5.5 million Europeans | 27 |
| About 5% of Europe | 18 |
| About 5 ml. | 11 |
| About 5 mL | 10 |
| About 40-60 beats per minute | 28 |
| About 40% of all insect species | 31 |
| About 40 degrees, for N.Y.C. | 28 |
| About 4,050 square meters | 25 |
| About 4,047 square meters | 25 |
| About 4,000 miles of an above-average construction? | 51 |
| About 4% of whole milk | 22 |
| About 4% of a marathon | 22 |
| About 4% of a fifth | 19 |
| About 4 p.m. in Britain | 23 |
| About 4 million Americans, religiously | 38 |
| About 39 inches, in England | 27 |
| About 39 inches in Soho | 23 |
| About 39 inches in England | 26 |
| About 39 inches | 15 |
| About 38 grams | 14 |
| About 36 pounds, in Pinsk | 25 |
| About 35.3 cubic feet | 21 |
| About 35 ounces | 15 |
| About 33.8 fluid ounces | 23 |
| About 32 million sq. mi. of water | 33 |
| About 32 laps in many pools | 27 |
| About 30% of the world's land | 33 |
| About 30% of the earth's land | 33 |
| About 30% of Earth's land area | 34 |
| About 30% of all land | 21 |
| About 30% of Africa | 19 |
| About 30 percent of the earth's surface | 43 |
| About 30 percent of Earth | 25 |
| About 30 percent of Africa | 26 |
| About 3/4 of la Terre | 21 |
| About 3.5 million square miles | 30 |
| About 3.38 fluid ounces | 23 |
| About 3.26 light-years | 22 |
| About 3,300 feet, to runners | 28 |
| About 3,000,000 inhabitants of France | 37 |
| About 3,000 miles from EST | 26 |
| About 3 grains in weight | 24 |
| About 28 grams | 14 |
| About 264 gallons | 17 |
| About 26,000 square miles of Asia | 33 |
| About 252 calories, briefly | 27 |
| About 25.4 mm | 13 |
| About 25,000 square miles of Asia | 33 |
| About 25,000 square miles in Asia | 33 |
| About 24 times a year | 21 |
| About 23 degrees | 16 |
| About 22.5 degrees | 18 |
| About 22 degrees | 16 |
| About 21% of the atmosphere | 27 |
| About 21% of air | 16 |
| About 20% of the earth's land: Abbr. | 40 |
| About 20 pinches: Abbr. | 23 |
| About 20 klicks northeast of Amsterdam | 38 |
| About 2.6 times the square of the length of one side, for a regular hexagon | 75 |
| About 2.54 centimeters | 22 |
| About 2.5 centimeters | 21 |
| About 2.5 acres | 15 |
| About 2.20 pounds | 17 |
| About 2.2 pounds, for short | 27 |
| About 2.2 pounds | 16 |