The total weight of apples and pears he sold is 8.9 kilograms.
We are told that 2/5 of this weight is from apples. To calculate how much is a fraction out of the weight, we need to multiply the total weight by the fraction we need.
First, find the fractions that the pears represent:
Since 2/5 are from the apples --> 3/5 of the weight are pears.
So we multiply 8.9 by 3/5:

To solve this expression, we multiply 8.9 by 3 and then divide by 5:

5.34 kilograms of the total weight are the pears.
Answer:
The pears represent 3/5 of the weight which is 5.34 kilograms