There are no decimeters in 9 cm. A centimeter is one one-hundredth of a meter. A decimeter is one tenth of a meter. You would need one more centimeter to have a decimeter.

There are 100 centimeters in one meter. Therefore, one centimeter is equal to 1/100 = 0.01 meters. 1 centimeter = 0.01 meters 1 meter = 100 centimeters