Question

Alexis is making cookies. The recipe says that she has to mix 192 grams of sugar into the flour. Alexis knows that 1 cup of this particular sugar has a mass of 128 grams. How many cups does she need?
EDIT: Okay, I found it out for anyone wondering. It's 1 1/2 cups.

Answer 1

For this case we can make the following rule of three:
 1 cup ----------------> 128 grams
 x ----------------------> 192 grams
 From here, we clear the value of x.
 We have then:
 x = (192/128) * (1)
 x = 1.5
 x = 1 1/2
 Answer:
 She needs about 1 1/2 cups.