12% of 31
= 12% * 31
= 0.12 * 31
= 3.72

The ISO standard for electrical wiring in a road vehicle depends on the vehicle. The ISO's include 1185:2003, 1724:2003, and 3731:2003. The ICS standard is 29 and 31.

You did not indicate a full year...

12/31/50: Sunday

12/31/51: Monday

12/31/52: Wednesday

12/31/53: Thursday

12/31/54: Friday

12/31/55: Saturday

12/31/56: Monday

12/31/57: Tuesday

12/31/58: Wednesday

12/31/59: Thursday

As you can tell, through the 2 day skips in 1952 and 1956 they were leap years.

Hope this helps !

31/12 = 2.583333

Iso Tauber was born on January 12, 1924, in Sarajevo, Bosnia & Herzegovina, Yugoslavia.