Answering Rose's Probability question

The question was What is the p(white) marble? Express as fraction, ratio and percent.

There are eight marbles and there are 4 white marbles, so the favorable outcome is 4 over possible outcome which is 8

Fraction: 4/8 but you can still simplify it so it is 1/2 because you can divide 8 & 4 by two.

Ratio: 1:2

percent: 50% because if you divide 1 by 2 you get .5 then you turn it into a percent.