Answer:
1.50
Explanation:
The tenths place is the number to the exact right of the decimal, in this case it would be the 5. To round, you need to look to the number to the right of it, in this case it would be the 3.
There's this rule, there's also a rhyme, but I can't remember it atm, anyways it's 5 or higher you round up, 4 or lower you round down. So because it's a 3 you round down, which bascially means it stays the same.