The difference 79.86 - 17.61 is 62.25.
So, each digit value has a different difference, for example, 70 - 10 gives 60, 9 - 7 gives 2, 0.8 - 0.6 gives 0.2, and 0.06 - 0.01 gives 0.05.
Therefore, the whole expression would be
[tex](70-60)+(9-7)+(0.8-0.6)+(0.06-0.01)[/tex]