Jesse bought 5.2 pounds of grapes for $7.75. Using the unit rate, how much would 3 pounds of grapes cost?
So the unit price is
In the context of this question unit rate is the cost of 1 (unit) pound of grapes.
To turn the 5.2 into 1 divide it by 5.2. For multiply or divide, what we do to the bottom we also do to the top to maintain correct proportions.
To reduce rounding error use
1 pound cost
Multiply both sides by 3