[yī bàn]

more than half
一半以上

the other half
另一半

cut down the expenditure by half
減少一半開支

Pay half now and the rest later.
現在付一半， 剩下的以后再付。

Half of four is two.
四的一半是二。

Half of the books are novels.
這些書中有一半是小說。