I'd say about 5 tbsp, considering 1 tsp = 1/3 of a tbsp.
3 tsps per tbsp
15 tsp is equal to 3 tbsp.
5 tbsp
15 tsp 1 tablespoon = 3 teaspoon 1 teaspoon = 0.33 tablespoon
That is 15 teaspoons
5 tbsp 1 tablespoon = 3 teaspoon 1 teaspoon = 0.33 tablespoon
0.16 tbsp 1 tablespoon = 3 teaspoon 1 teaspoon = 0.33 tablespoon
34 tbsp 1 tablespoon = 3 teaspoon 1 teaspoon = 0.33 tablespoon
3.33 tbsp 1 tablespoon = 3 teaspoon 1 teaspoon = 0.33 tablespoon
148.33 tbsp 1 tablespoon = 3 teaspoon 1 teaspoon = 0.33 tablespoon
4 tbsp 1 tablespoon = 3 teaspoon 1 teaspoon = 0.33 tablespoon
3 tbsp 1 tablespoon = 3 teaspoon 1 teaspoon = 0.33 tablespoon