18 cannot be a binary number as binary numbers are base two and each digit can only be 0 or 1.
If you are asking what is 18 in base 10 converted to base 2, then:
18 ÷ 2 = 9 r 0
9 ÷ 2 = 4 r 1
4 ÷ 2 = 2 r 0
2 ÷ 2 = 1 r 0
1 ÷ 2 = 0 r 1
reading the remainders in reverse order → 1810 = 100102
Decimal 18 is 10010 in binary
Binary form of 18 is "10010"
Expressed as a decimal fraction, 18/100 is equal to 0.18.
.18
Expressed as a decimal, 18/25 is equal to 0.72.
Decimal 18 is 10010 in binary
Expressed as a decimal, this is equal to 0.18.
54
Binary form of 18 is "10010"
.055555.......
Expressed as a decimal fraction, 18/100 is equal to 0.18.
18/20 in decimal form = 0.9
.18
1.8
Expressed as a decimal, 9/18 is equal to 0.5.
Expressed as a decimal, 18/25 is equal to 0.72.
decimal form of 12 over 18 = 0.6667