Because in ancient Rome I) meant 1*500 = 500 and (I) meant 1*1000 = 1000 and over time they became D and M respectively
The letter "D" represents the number 500 in Roman numerals.
The 7 main Roman numerals are: M D C L X V and I
"D" in Roman Numerals equals 500.
The number 500 is represented by the Roman numeral D
16
D
The letter "D" represents the number 500 in Roman numerals.
The 7 main Roman numerals are: M D C L X V and I
7 of them and they are: M=1000, D=500, C=100, L=50, X=10, V=5 and I=1
d or D is a Roman numeral equivalent to 500
"D" in Roman Numerals equals 500.
The number 500 is represented by the Roman numeral D
LV
MCXVII
16
V
That is 29.