With 120 employees total and 20 signed cards, how many more employees need to sign before the National Labor Relations Board can call for an election?

For a union to request an election from the National Labor Relations Board (NLRB), it must demonstrate that at least 30% of the employees in the bargaining unit have signed authorization cards. In this case, with a total of 120 employees, the threshold for 30% would be calculated as follows:

30% of 120 employees is 36 employees (0.30 * 120 = 36).

Currently, there are 20 signed cards. Therefore, to determine how many additional employees need to sign, you subtract the current number of signed cards from the 30% requirement:

36 - 20 = 16.

This calculation shows that 16 more employees need to sign cards in order to reach the required 30% threshold necessary for the NLRB to call for an election. Hence, the correct answer reflects the required number of additional signatures needed to proceed with the election process as stipulated by the National Labor Relations Act.