A percentage is simply telling us a ratio of something per one hundred of that thing. So, for example, 10% means 10 out of 100. We can therefore always write a percentage as a fraction by putting the value divided by 100.
Therefore 81.49% means 81.49/100. To divide by 100 simply move the decimal point two places to the left. So the answer is 0.8149.
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To write 15.5 percent as a decimal, you divide the percent value by 100. So, 15.5 percent as a decimal is 0.155.
15.7 percent as a decimal is .157.
35.4 percent written as a decimal is .354
decimal .4 percent 40%
Decimal 21.0=21 percent 2100