What would 1/3 be equal to as a decimal? Would it be .3?

1/3 cannot be easily expressed as a decimal

1/3 = .33333.... (the 3's repeat forever)

your answer of .3 would be 3/10

there are two generally accepted ways to show repeating decimals

a) 1/3 = .3 with a "dot" over the 3, or
b) 1/3 = .3 with a bar over the 3