Rule: "rounded to 2 decimal places" means look at the thousandths digit. >= 5 round up, <= 4 round down.

Distance	=	1.503 km
Look at the thousandths digit: 3. Since 3 <= 4, round down. The hundredths digit stays at 0.
Rounded to 2 d.p.	=	1.50 km = 1.5 km