Answer: glhe should increase the price by $0.9 and the new price would be $3.15
Explanation:
The amount at which Leonard purchased each package of grid paper is $2.25.
If he wants to make a 40% profit on each package he sells to his classmates, then the amount by which he should increase the price for each package of grid paper is
40/100 × 2.25 = 0.4 × 2.25 = $0.9
Therefore, the new price for each package of grid paper would be
2.25 + 0.9 = $3.15