Concentration Calculation (Increasing Concentration)
Calculate the amount of salt needed to create a saltwater solution with a new concentration by adding salt to an existing saltwater solution.

| Salt in A | g |
| Salt in B | g |
| C: Saltwater | gSalt in C g |
(1) Salt in A = Saltwater in A × Concentration in A
(2) Salt in B = Salt in A * (Concentration of C / Concentration of A - 1) / (1 - Concentration of C / 100)
(3) Saltwater in C = Saltwater in A + Salt in B
(4) Salt in C = Salt in A + Salt in B
(2) Salt in B = Salt in A * (Concentration of C / Concentration of A - 1) / (1 - Concentration of C / 100)
(3) Saltwater in C = Saltwater in A + Salt in B
(4) Salt in C = Salt in A + Salt in B
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