Decimal 21.0=21 percent 2100
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21% written as a decimal is 0.21
Since all percentages are out of 100, 21% is 21/100. Then, whenever you have a percentage, move the decimal two places to the left to get the decimal. So, because 21% can be written as 21. %, 0.21 is the decimal value for 21%.
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