A recipe for carrot-bean soup calls for 750 ml of broth, 300 g of beans, and 1/2 cup sliced carrots. How many grams of beans and cups of carrots will you use if you only have 600 ml of broth?
600/750 = 4/5
The number of beans is 4/5*300.
The number of carrots is 1/2*4/5.