Given that,
Last year record = 12
This year record = 15.
To find,
The percent increase of his Collection.
Solution,
The percent increase in his collection is given by :
[tex]\%=\dfrac{\text{final collection-initial collection}}{\text{initial collection}}\times 100\\\\=\dfrac{15-12}{12}\times 100\\\\=25\%[/tex]
So, the percent increase of his collection is 25%.
