It's already in decimal form
Impossible to answer without a detailed description
5 over 6 changed to a decimal is 0.8333 . . .
a repeating decimal
It is a terminating decimal
It is simply: -1 = -1.0 as a decimal
a terminating decimal. got this from chacha.
18,200,000
0.625
0.425
it was changed because Australia became a separate state.
0.4
30% = 0.30