When you count the small lines in between 8 and 9, there are 8 lines
The difference between 8 and 9 is 1
Divide 1 by 8, you will have 0.125
This implies each small lines represent 0.125
When you count from 8 to where the point is, we have 6 small lines
Multiply the 6 by 0.125, we will have 0.75
8 + 0.75 = 8.75
The decimal is 8.75