It is simply: 21.0
It is: 21/50 = 0.42 as a decimal
0.021
21 in decimal form can be 21.0 or 21.00 or 21.000, or however many zeros you'd like to write after the decimal point.
It is: 21/100 = 0.21 as a decimal
To write 9.75 as a decimal, you simply write the whole number part followed by a decimal point and then the decimal part. Therefore, 9.75 can be written as 9.75 in decimal form.
.21
21% written as a decimal is 0.21
It is: 21/50 = 0.42 as a decimal
If you mean 21/1000 then it is 0.021 as a decimal
Decimal 21.0=21 percent 2100
21/8 = 2.625
0.21
0.021
"21 and a quarter" written as a decimal is 21.25 , regardless of its units.
21/10 as a decimal is 2.1
0.21
2.1