it is 2/3 of senate
requires a 51 of 100 (majority) vote by the senate
Confirmation of most presidential appointments requires the approval of more than half of the Senators present (U.S. Constitution, Article II, Section 2, Clause 2). Confirmation of a presidential appointment to fill a vacancy in the vice presidency requires the approval of more than half of both Houses of Congress (Amendment XXV, Section 2).
the senate confirms the nomination made by the president
Congress, as a whole does not vote on presidential appointments. It is only the Senate that must give its advice and consent to presidential appointments.
Nominees have to receive he Advice and Consent of the Senate.
Most presidential appointments, including federal judges, cabinet members and ambassadors, require a simple majority vote of the Senate. Mid-term appointments of vice presidents require a simple majority vote of both Houses of Congress, and treaties require a two-thirds majority vote of the Senate.
Senate
power to make treaties
67 members of the senate and 291 members of the house vote to override the president
The president nominates individuals for each of his cabinet positions and the Senate must vote to approve those nominations. To specify, that's how it goes in the US.
The President appoints or nominates people to fill these positions but the Senate must approve them before they can take office unless a vacancy occurs while the Senate is in recess.
The US President suggests an appointment to the Senate and the Senate confirms the appointee with a two-thirds vote. If the appointee cannot get Senate confirmation, the President will usually rescind the appointment and try to appoint someone more to the Senate's liking.