Suppose you design a grandfather clock that uses a pendulum to keep accurate time, using g =?

Suppose you design a grandfather clock that uses a pendulum to keep accurate time, using g = 9.81 m/s2 . If the actual value of the acceleration due to gravity is g = 9.8001 m/s2. Will the clock run fast, or slow? By how much will the clock be inaccurate at the end of one day?