It depends upon for what you need the estimation.
However, 0.3 is exactly 3/10 which is a much more useful estimate (if it could be called one) as dividing a non-repeating decimal number by 10 guarantees an exact answer in decimals whereas dividing by 3 (or multiplying by 1/3 which is the same) can lead to repeating decimals which can only be approximated as a terminating decimal.
How good the estimate is depends on your needs. It may be good enough for some purposes; not good enough for others. The difference between 1/3 and 3/10 is 1/30; in percentage terms, 1/3 is about 11% more than 3/10.
One third in decimal form is .3333 repeated
4 and one third written as a decimal is 4.333333333333...etc.
The decimal equivalent to negative seven and one-third is -7.333
It already is decimal expression of one-third.
One third = 1/3 = 0.333...
Although it is not exact, it is a decent rough estimation
It could be 0.2 to one decimal place.
0.8 to one decimal place or 1 as a whole number.
One third in decimal form is 0.3333 . . .
one third as a decimal = 0.33
One third in decimal form is 0.33
One third in decimal form is .3333 repeated
4 as a whole number or 4.2 to one decimal place.
4 and one third written as a decimal is 4.333333333333...etc.
One and one third is 1.3333 . . .
The decimal equivalent to negative seven and one-third is -7.333
One third is equal to 0.33 decimal. One third is a fraction that is derived at dividing a whole number into three equal parts.