you do this by 18*18
You can write it as (18, 24) or 18 + 24 iOr use -24 if appropriate.
18/x
0.018 is 18 thousandths.
18 + w
Decimal 18 is 10010 in binary
18 = XVIII
It is: 18/100 = 0.18 as a decimal
It would be: 18 -x
18/20 as a percentage is 90%
18/100 or 9/50
18% = 9/50