Answer:
21.67 grams
Step-by-step explanation:
Keiko apparently wants to have 70.97 grams of salt in the container, and has already put 49.3 grams into it. Â To find the quantity of additional salt that must be poured into the container, so that it will contain 70.97 grams, subtract 49.3 grams from 70.97 grams; the result is 21.67 grams.
Adding 21.67 grams of salt to the container will bring its contents up to a total of 70.97 grams.