Then multiply denominator with denominator, and numerator with numerator which will give you (30/3) since two negatives are multiplied cancel out it is positive
It's 5 over 9 because you start off with 10 cards (6 roses 4 daisies) then you pick a rose. Then it become's 5 over 9 since there are only 5 roses left and 9 total cards left.