Twenty-one hundredths.
21 = twenty-one
You would write it like this 21 or 2.1*10^1.
21/36 in simplest form is 7/12
Twenty-one million, two-thousand nine-hundred fourty-three.
21% = 21/100 in fraction form.
21/125
To write 21 hundred-thousandths in standard form, you first recognize that "hundred-thousandths" is equivalent to dividing by 100,000. Therefore, 21 hundred-thousandths is 21/100,000. In standard form, this would be written as 0.00021.
21.012
It is already in its simplest form as a fraction.
21/7 in simplest form is 3/1 = 3
21/22 is already in simplest form