It is 0.1
The number 51.2 is known as a decimal. The decimal is in the 10th place.
9/10 as a decimal is 0.9
To round to nearest 10th, look at the 100th place. If it is 5 or more, round the 10ths place up, otherwise leave it the same, and drop the rest of the decimal. So 5.524 rounded to the nearest 10th is 5.5, since the 100ths place is 2.
It is 2.6457513111
1/5th = 2/10th's
It is 0.1
The number 51.2 is known as a decimal. The decimal is in the 10th place.
9/10 as a decimal is 0.9
To round to nearest 10th, look at the 100th place. If it is 5 or more, round the 10ths place up, otherwise leave it the same, and drop the rest of the decimal. So 5.524 rounded to the nearest 10th is 5.5, since the 100ths place is 2.
I think 3.141592654
It is 2.6457513111
2/5 is the same as 4/10 and as a decimal it is 0.4
Move the decimal 2 places to right to change any decimal to a percent. Reverse, move decimal 2 places to the right to change any percent to a decimal. Knowing this should show that they represent the same quantities.
.2
3.1
Two thousandths written as a decimal is 0.002