Katy's has a recipe that needs 3/4 teaspoons of salt for 1 1/2 cups of sugar . if she uses 2 1/2 cups of sugar, how much salt does she need

She needs about 1 1/4 teaspoons of salt. Hope I helped!

1 1/2 = 3/2 cups of sugar
3/2 sugar = 3/4 salt
Let's find how much salt = 1 cup of sugar
3/2 times 2/3 = 1
2/3 times 3/4= 1/2
If she uses 2 1/2 salt it is simple now.
2 1/2 = 5/2 times 1/2 gives you 5/4 = 1 1/4.