How 87 breaks down

Roman numerals are additive from left to right (with subtractive pairs like IV=4 and CM=900). LXXXVII decomposes as: L = 50 + X = 10 + X = 10 + X = 10 + V = 5 + I = 1 + I = 1 = 87.

Nearby numbers

Number	Roman numeral
83	LXXXIII
84	LXXXIV
85	LXXXV
86	LXXXVI
87	LXXXVII
88	LXXXVIII
89	LXXXIX
90	XC
91	XCI

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