 Hello and welcome to the session. In this session we discussed the following question which says, by how much should 84.2 be decreased to get 25.34? Let's move on to the solution now. To find out that by how much should 84.2 be decreased to get the result as 25.34 we need to subtract 25.34 from 84.2. To do the subtraction of these two decimal numbers first we need to convert the given decimal numbers to like decimals that is we need to make the decimal places of both the decimal numbers as same. So 84.2 could be written as 84.20 minus 25.34. Now these two decimal numbers are like decimals. Now we arrange both these decimal numbers in such a way such that the smaller of the two numbers come at the larger one in the column form. So first we write 84.20 and below it we would write 25.34 since 25.34 is smaller than 84.20. The decimal points of both the numbers should come in the same column and the digits of the same place would also lie in the same column. So we have arranged the numbers in this way. Now we can subtract these two numbers as we subtract the whole numbers. On subtracting both these numbers we get 5886 and we put the decimal point directly under the decimal point of the given numbers that is we put the decimal point here. So 58.86 would be the answer when we subtract both the decimal numbers. So we can now say that 84.2 should be decreased by 58.86 to get 25.34. So final answer is 58.86. This completes the session. Hope you have understood the solution for this question.