Hey there!
To find the unit price of your pears, in other words, how much you must pay for one pear, you must first set up this proportion where x is equal to the price of one pear:
4.59/5.4=x/1
Now, cross multiply and solve for x:
4.59*1=5.4*x
4.59=5.4x
x=0.85
Therefore, the unit price of the pears is $0.85 for every pear.
Hope this helps and have a nice day!