Write 30.75% as a decimal to the nearest thousandth.

Percent means part out o 100

30.75%=30.75/100=3.075/10=0.3075/1=0.3075

thousandth is 3rd place
for 0.1234, thousandth would be the 3
to round to thousandth, look one place to the right (to the 4), if that number is:
greater than or equal to 5, add 1 to the thousandth place (3 turns to 4)
less than or equal to 5, leave the thousandth place as is (3)

so

0.3075
7 is thousandths
5 is before it and is equal to or greater to 5
7+1=8

0.308 is answer