6.6 billion x .80 = 5.28 billion
Note: To calculate percent of any number, move the decimal point two places to the left, and then multiply. In this case 80% becomes .80.
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It is 100*66/80 = 82.5%
80% of 2.3 billion= 80% * 2300000000= 0.8 * 2300000000= 1,840,000,000
66/80 = 0.825 So by moving the decimal place, we get 82.5% or about 83% if you round.
2% of 80 billion = 80*2/100 biilion = 1.6 billion
66 percent = 0.66; 66/100