On weekends, Brown is earning 2/3 of a dollar for every candy he sells. If he sells 30 candies, how much will he earn?

two thirds times thirty

(2/3)(30) = 2(10) = $20

Alternately... as Michael said...

$ per candy = $0.67

.67(30) = $20.10

The reason this is different is due to the

rounding of 2/3 when converted to a fraction.