Probability help for a brainlet.

No.11304112 ViewReplyOriginalReport
Let's say P(A) = 0.99, P(B) = 0.99.
And P(B|A) = 0.1.

What is P(A U B)?

I tried doing the normal method where:
P(A U B) = P(A) + P(B) - P(A and B)
But that adds up to greater than 1.