13 can't be a decimal because it is a whole number but if you were to write 13 as a decimal you would write it like this. 13.0
It is simply 13.0 as a decimal
13. 250 as decimal = 13.250 or 13.25
13/10000, as a decimal = 0.0013
13% = 0.13 1% = 0.01 9% = 0.09 just divide by 100 when going from percent to decimal
1/13:= 1 ÷ 13= 0.0769 in decimal
.13
13.00000
13/20 = 0.65
0.13
13/10 = 1 + (3 ÷ 10) = 1.3
You write 1 6 as 1.6 in decimal form.