The number is already in decimal form so why would you want to estimate it in decimal form???
When dividing it by is factor of 100 it would be .453333333.
I would estimate the value of 0.87 to be around 0.86999999...
That would signify dividing by ten.
Converting a percent to its decimal equivalent is accomplished by dividing by 100 (or moving the decimal two places to the left): 150 ÷ 100 = 1.50
When you are dividing a decimal by a whole number you have to bring up the decimal. For example, 36.4 divided by 2, you would take the decimal that is between the 6 and the 4 in 36.4 and you bring it up. Then you divide like you normally would.
Converting a percent to its decimal equivalent is accomplished by dividing by 100 (the same as moving the decimal two places to the left): 0.1 ÷ 100 = 0.001
Think about the number next to the decimal, can it round the number before the decimal point?. if so change it. if not just leave it like that. for example if you estimate 13.33 it would equal to 13. 5 or more up the score. 4 or less drop the rest. hope this helps!
Depending on the direction, that would indicate dividing or multiplying by one hundred.
3.31
The answer depends on what you are doing with it.If dividing by 28, I would round to 5600.If adding to 5 billion, I would round to 0.
The value would be 'pi' which is 3.142 to three decimal places and is applicable to any circle.