8/9-8/15•5/6=0,833

Using standard order of operations (multiplication before subtraction):

• (8/15) × (5/6) = 40/90 = 4/9
• 8/9 − 4/9 = 4/9

So the value is 4/9, which is 0.\overline{4} (approximately 0.444...).

Not 0.833. If you meant a different grouping (e.g., (8/9 − 8/15) × 5/6), let me know and I can check that as well.