Answer:
Keller family's pancake recipe uses 2 teaspoons of baking powder for every 1 3 of a teaspoon of salt.
To find out how much baking powder they would need if they used 1 teaspoon of salt, we can set up a proportion:
2 tsp baking powder / (1/3) tsp salt = x tsp baking powder / 1 tsp salt
where x is the amount of baking powder needed if they use 1 tsp of salt.
To solve for x, we can cross-multiply and simplify:
2 tsp baking powder * 1 tsp salt = x tsp baking powder * (1/3) tsp salt
2 tsp = (1/3) x
Multiplying both sides by 3:
6 tsp = x
So the Keller family would need 6 teaspoons of baking powder if they used 1 teaspoon of salt in their pancake recipe