If someone is 142cm tall and another person is 1240mm tall who is taller How much taller?
Convert to the same units, then the comparison and calculation
can be made.
1 cm = 10 mm
→ 142 cm = 142 × 10 mm = 1420 mm
1420 > 1240 → the person 142 cm is taller.
1420 - 1240 = 180 mm → they are 180 mm = 180 ÷ 10 cm = 18 cm
taller.