If 64259 - 49857 = 25602 ; 4958 - 3972 = 1026 than 98654 - 24318 = ?

Question

If the digits of a two-digit number are interchanged, the obtained number is 27 more than the original number. The digits of the number are in the ratio of 2 : 1, then
What is the original number?

Answer 1

The answer is the difference between the largest and smallest number in each digits.
6 4 2 5 9
4 9 8 5 7 (-)
- -
2 5 6 0 2 ( Subtract Big - small number in each unit's , ten's , 100's place etc.)
- -
Similarly, on the given prb,
9 8 6 5 4
2 4 3 1 8 (-)

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7 4 3 4 4

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Answer is 74344