Answer: 275%
Explanation:
Given : The current weight of the puppy : 2,250 grams
The weight of the puppy at the last visit = 600 grams
Increase in weight :-
![2250\text{ grams}-600\text{ grams}=1650\text{ grams}](https://img.qammunity.org/2020/formulas/mathematics/high-school/3yip42xr8t6pz6l7ljpusto7g7ihrq0jlv.png)
Now, the formula to calculate the percentage increase is given by :-
![\frac{\text{Increase in quantity}}{\text{Previous quantity}}*100](https://img.qammunity.org/2020/formulas/mathematics/high-school/jod1m0jvzh1ecc45x7rwrs7fhbttsoy7b9.png)
The percentage increase in weight is given by :-
![(1650)/(600)*100=275\%](https://img.qammunity.org/2020/formulas/mathematics/high-school/vru6co4a5rdqp2webagc1f7gdlxs7atx3w.png)
Hence, the percent increase in the puppy's weight = 275 %.