Answer:
69%
Explanation:
If the diameter is increased by 30%, it is effectively multiplied by the factor ...
1 + 0.30 = 1.30.
Volume is proportional to the square of the diameter, so the larger can's volume is ...
(1.30)² = 1.69
times that of the smaller can. That is, 0.69 = 69% of the volume of the smaller can has been added to make the volume of the larger can.
The volume of the larger can is 69% more than that of the smaller can.