Final answer:
The weight that the student can lift has increased by 50%.
Step-by-step explanation:
To calculate the percentage increase in the weight that the student can lift, we can use the formula:
Percentage Increase = ((New Value - Old Value) / Old Value) * 100
Let's plug in the given values:
Old Value = 2 kg
New Value = 3 kg
Percentage Increase = ((3 - 2) / 2) * 100
= 50%
Therefore, the weight that the student can lift has increased by 50%.