As we know One d is equal to 0.001 h (1 d = 0.001 h).

To convert Deci to Hecto, multiply your d figure by 0.001.

Example : convert 25 d to h:

25 d = 25 × 0.001 h = h

To convert Hecto to Deci, divide your h figure by 0.001.

Example : convert 25 h to d:

25 h = 25 ÷ 0.001 d = d