To write 7 as an ordinal number, you would write it as "seventh."
When you write the decimal number '7' in Base-2 (binary), you write '0111'.
X(the number) - 7- 5
x - 7
x<7
The number 7 is written as seven.
710 = 1112
7 4/7
7 and 6/7
509 over 7 as a mixed number = 725/7
216 over 7 as a mixed number = 306/7
216 over 7 as a mixed number = 306/7