Emily added 5 grams of water into 20 grams of 50% salt solution. She made ___ grams of ___% salt solution.

For the first blank, the answer should be the total weight of the solution which is derived from adding 5 grams and 20 grams. The answer would be,

        T = 5 + 20 = 25 grams

For the second blank, the % solution is derived by dividing the amount of salt initially by the total amount of the resulting solution. This is as shown below.

      C = ((20 x 0.5) / 25) x (100%)
 
Simplifying,
      C = 40%

Answers: 
    a. 25 grams
    b. 40%