In Huanggang, Hubei, with a social security base of 17,900 yuan, the calculation of social security contributions mainly involves several major insurance types such as endowment insurance, unemployment insurance, and work-related injury insurance. Here's a breakdown:

1. Endowment Insurance: The total contribution rate for endowment insurance is 24%, with 16% borne by the employer and 8% by the individual. For an employee with a salary of 17,900 yuan, the employer's monthly contribution is ​
   ×16%=
   yuan, and the individual's monthly contribution is ​
   ×8%=
   yuan.

2. Unemployment Insurance: The total contribution rate for unemployment insurance is 1%, with 0.7% paid by the employer and 0.3% by the individual. So, the employer's monthly contribution is ​
   ×0.7%≈125.3
   yuan, and the individual's monthly contribution is ​
   ×0.3%≈53.7
   yuan.

3. Work - related Injury Insurance: The contribution rate for work - related injury insurance varies according to the industry risk level, ranging from 0.2% to 1.9% and is entirely borne by the employer. For example, if the industry's work - related injury insurance rate is 0.5%, the employer's monthly contribution is ​
   ×0.5%=89.5
   yuan.

In general, with a social security base of 17,900 yuan in Huanggang, the individual's monthly social security contribution is approximately ​