How to the number 997 in Roman numerals and in brackets.Please help. Share with your friends Share 0 Shruti Tyagi answered this Dear student, 997=900+90+7900=1000-100=M-C=CM90=100-10=C-X=XC7=5+1+1=VIISo, 997 can be written as CMXCVII Regards 0 View Full Answer