All you need to do is find the rate of the cost. This means finding the cost of each liter.
Brand A's rate is running at about $2.60 (16.99÷6.5)
Brand B's rate is running at about $1.25 (24.96÷20)
Brand B's laundry detergent costs less than Brand A's laundry detergent. Remember to vote me Brainliest if I helped you!