A soup recipe for 6 servings uses 450 millilitres of milk. How many millilitres are needed for 14 servings at the same recipe proportions? Enter the number of millilitres.

Explanation

Each serving accounts for 450 divided by 6, or 75 millilitres, so 14 servings need 1,050 millilitres. Adding the eight extra servings to 450 would give 458, which does not scale the ingredient by the serving factor.