How do you round off 0.78372 to three decimal places?

Hint: In the given question we are given the number 0.78372 which we need to round off to three decimal places. So, if we want to round off any number to n places then we look at the n+1 place and then decide what would be at the nth place and write the round off number of any number.

Complete step-by-step solution:
In the given question we are given a decimal number which has five digits after decimal. The given number is 0.78372 and we need to round off the same number to three decimal places. So, for this we need to check the fourth digit of the number and then check whether the digit is greater than 5 or not. If it is greater than 5 then we increase the third digit by 1 or else the third digit remains the same. Also, we don’t have to check any other digits after this and also after checking this thing all digits are removed by writing the rounded off form of the number.
Now, the fourth digit is 7 which is greater than 5 therefore the third digit becomes 4 and hence the rounded off form of the number is 0.784.
There the round off of 0.78372 is 0.784.

Note: Now, in this question we make many silly mistakes as we get confused that in order to round off any number to n places then we need to check which digits of the number. Also, we forget to remember that the n+1 digit is compared with 5 in order to increase the nth digit of the number to round off by n digits.