I've been working on this assignment for my intro class . I figured out how to set majority of data type but I am stuck at setting a data type for ratios.
Can someone help me out with this ?

CREATE TABLE DAYCARE205.CHILD_STAFFRATIO (
CHILD_STAFFRATIOID VARCHAR(3) NOT NULL CONSTRAINT DAYCARE205.CHILD_STAFFRATIO_PK PRIMARY KEY,
AGEGROUPID VARCHAR(3)NOT NULL,
NUMBEROFCHILDREN VARCHAR(3),
CHILDSTAFFRATIO VARCHAR(4) NOT NULL,
CONSTRAINT DAYCARE205.CHILD_STAFFRATIO_AGEGRP_FK FOREIGN KEY (AGEGROUPID)
REFERENCES DAYCARE205.AGEGROUP_FEE (AGEGROUPID));

Thanks