The concentration of solid solutions, like jewelry, is expressed as karat. Pure gold is referred to as 24 karats. If you have an 18 karat gold ring, how much gold (in % by m/m) is present in here?

Step 1. Identify the given: ___________________

Required: Solve for, __________________

Step 2. Computations: Substitute the given to the formula.

Formula:

Percent by mass(m/m) =



x 100%

Step 3. Therefore, _________​