Hello!
Let's find what 1/8 of 8 kilograms is, because that'll help us find 6/8 of them.
Now, you can find 1/8 of 8 kilograms using many different ways, but I just prefer this one.
8 ÷ 8 = 1
Multiply this by the numerator of the fraction that represents how much that guests ate.
1 × 6 = 6
ANSWER:
The guests ate 6 kilograms of the food.