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At this point, I'm unclear about what the variables P, R, and B represent. Can you provide some context for this problem?
Oh, never mind, I got it now. P = percentage, R = rate, and B = base.
The applicable formula is P = R * B
With R = 33 1/3% and B = 150, the value of P is:
P = (33 1/3 %)(150) = (0.3333)(150) = 50
Solution: P = 50
Please feel free to ask if you have any questions about this solution.