Question

If 2 cups of ketchup= 1 cup of tomato sauce, then ____ cups of ketchup= 2.25 cups of tomato sauce.

Answer 1

4.5 since it shows that you get 2 ketchups for every one tomato sauce 4.5/2 is 2.25

Answer 2

We have an equation: 2/1= ?/2.25

Cross multiply:
1*?= 2*2.25
⇒ ?= 2*2.25= 4.5

The final answer is 4.5~