The roman form of decimal 620 is: D C X X
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Roman numeral DCXX represents the number 620.
620
To find 55 percent of a number, multiply the number by 0.55. In this instance, 0.55 x 620 = 341. Therefore, 55 percent of 620 is equal to 341.
2 x 2 x 5 x 31 = 620
To determine the ratio of 620, more context is needed, as ratios typically compare two or more quantities. If you mean the ratio of 620 to a specific number, please provide that number for clarification. Alternatively, if you are asking for a ratio of 620 in relation to itself, it would simply be 1:1.