The probability of two events A and B happening simultaneously is 0.15. The probability of only event A happening is 0.30. Find the probability of event B happening, if event A had already happened.

]supplementary angles are two angles that add up to . • complementary angles are two angles that add up to degrees. • adjacent angles share a and a • congruent angles have the measure. • an triangle has one angle that is greater than 90 degrees. • a triangle with angles 45°, 45°, and 90° would be a triangle