The easy way to change 21 / 25 to a decimal is to convert the bottom number to 100. Multiply top and bottom by 4, getting 84 / 100. This can now be written as 0.84.
21over 150 written as a decimal = 0.14
121 is already in the simplest form. It can be written as 0.047619 in decimal form (rounded to 6 decimal places).
7/21:= 7 ÷ 21= 0.333 in decimal
7 4/21 in decimal form is 7.190476 . . .
8 21/40 in decimal form is 8.525.
3
1.05
0.913
0.7
14 over 21 written in simplest form is 2/3
0.21 is 21 hundredths written as a decimal.
21/8 = 2 and 5/8 or 2.625.