How much shorter is 90 cm than 1m 20 cm cm?

To determine how much shorter 90 cm is than 1 m 20 cm, first convert 1 m 20 cm to centimeters. 1 meter is equal to 100 cm, so 1 m 20 cm equals 120 cm. Subtracting 90 cm from 120 cm gives you 30 cm. Therefore, 90 cm is 30 cm shorter than 1 m 20 cm.